Changelog for python312-sympy-1.13.3-1.2.noarch.rpm :

* Wed Nov 20 2024 Dirk Müller - update to 1.13.3:
* Handle matrices of zero columns correctly in the Matrix constructor.
* NumPy numbers can be used with clebsch_gordan
* An inconsistency in Float/Rational comparisons was fixed.
* Fixed a bug that caused LambertW to hang on specific inputs
* A regression introduced in SymPy 1.13 in the heurisch integration routine was fixed
* see also https://github.com/sympy/sympy/wiki/release-notes-for-1.13.0
* Sat Jun 29 2024 Dirk Müller - update to 1.12.1:
* improved compatibility with NumPy 2.0 and CPython 3.12
* Wed May 31 2023 Dirk Müller - update to 1.12:
* https://github.com/sympy/sympy/wiki/release-notes-for-1.12
* Sat Sep 17 2022 Arun Persaud - specfile:
* removed patch sympy_printing_ccode.patch; included upstream
* requires python >= 3.8 (skip 3.7)- update to version 1.11.1:
* The 1.11 release introduced a regression when using lambdify with the cse=True option (introduced in 1.9) resulting in a list being returned for a lambdified expression that was not a list. This bug is now fixed in the 1.11.1 release.- changes from version 1.11.0:
* Highlights: + Better support for integrating several different types of expressions. + The series expansion has seen several improvements. + The assumption system is now fully deterministic, so it should work in multi-threaded environments. + A new and improved Mathematica parser.
* full changelog at https://github.com/sympy/sympy/wiki/Release-Notes-for-1.11
* Thu Aug 04 2022 Matej Cepl - Switch off tests (they run 7h53m47s).
* Tue May 24 2022 Matej Cepl - Add sympy_printing_ccode.patch eliminating sympy.printing.ccode deprecated module, because it just stands in the way (gh#sympy/sympy#23533)
* Sat May 21 2022 andy great - Update to version 1.10.1.
* Fixed a bug that prevented unpickling pickles created with older sympy versions.
* The .diff method accepts string arguments again (fixing a regression in 1.10).- Update for version 1.10.0.
* The Laplace transform computations has become much more powerful using a rule-based system.
* All active deprecations in SymPy have been revamped.
* A number of classes and functions have been moved to better locations mostly to resolve problems with cyclic imports within the SymPy codebase.
* BREAKING: removed the since long deprecated densearith, densesolve, and densetools
* BREAKING CHANGE: core.trace with class Tr moved to physics.quantum.trace.
* Full changelog at https://github.com/sympy/sympy/wiki/Release-Notes-for-1.10- Update for version 1.9.
* The internal implementation of Matrix and other matrix classes (SparseMatrix etc) is now DomainMatrix.
* Leading term methods now raise PoleError at singularities.
* Full changelog at https://github.com/sympy/sympy/wiki/Release-Notes-for-1.9
* Fri May 14 2021 Arun Persaud - update to version 1.8:
* Backwards compatibility breaks and deprecations + Please manually add any backwards compatibility breaks or deprecations here, in addition to the automatic listing below. + assumptions AskHandler(), register_handler() and remove_handler() are deprecated. Handler now must be multipledispatch instance. (#20835 by AATTJSS95) + parsing Parsing of \"Q\" returns AssumptionKeys instance in assumptions module. This means that sympify(\"Q\") will no longer return a symbol. (#21152 by AATTJSS95)
* Full changelog at https://github.com/sympy/sympy/wiki/Release-Notes-for-1.8
* Mon Jan 25 2021 Ben Greiner - Update to 1.7.1: core
* There was a regression in 1.7 that meant that __slots__ would not work correctly for Basic instances and they would end up having __dict__. This also made it possible to set arbitrary attributes on Basic instances such as symbols which breaks immutability. This was fixed in 1.7.1 to ensure that Basic instances do not have __dict__ and it is not possible to set attributes on them. (#20590 by AATToscarbenjamin) s series
* Fixed lazy iteration of series with expr.series(x, n=None) which was broken in the 1.7 release. (#20589 by AATToscarbenjamin and AATTsachin-4099) stats
* Updated documentation for sympy.stats.sample for seed argument. (#20555 by AATTczgdp1807)
* sympy.stats.sample now has an optional seed argument. (#20528 by AATTczgdp1807)
* Random failures with sympy.stats.sample have now been fixed. (#20527 by AATTczgdp180- Changelog for 1.7.0: Backwards compatibility breaks and deprecations - ---------------------------------------------- core
* Modules and names that were accidentally importable from sympy are no longer importable. In sympy 1.6 importing and using these names would give a deprecation warning. In sympy 1.7 these names are removed. As an example from sympy import add would need to be from sympy.core import add or import sympy.core.add as add. (#19554 by AATToscarbenjamin)
* DEPRECATION: Using non-Expr args in Add, Mul or Pow is now deprecated (#19445 by AATToscarbenjamin) diffgeom
* Manifold.patches attribute is deprecated. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* Patch.coord_systems attribute is deprecated. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* Class signature names of CoordSystem is deprecated. CoordinateSymbol class and CoordSystem.symbols attribute are introduced instead. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* CoordSystem.transforms, CoordSystem.connect_to, and CoordSystem.coord_tuple_transform_to are deprecated. Class signature relations, CoordSystem.transformation and CoordSystem.transform are introduced instead. (#19368 by AATTJSS95 and AATTmcpl-sympy) printing
* sympy.printing.pretty.pretty_symbology.xstr has been deprecated (#20081 by AATTeric-wieser)
* The unicode argument to sympy.printing.stringpict.prettyForm has been deprecated (#20081 by AATTeric-wieser)
* The deprecation of calling preview with viewer=\"StringIO\" is now expired instead of forgotten (a regression in 1.6.0) (#19905 by AATTeric-wieser)
* The modules sympy.printing.ccode, sympy.printing.fcode, and sympy.printing.cxxcode have been renamed to sympy.printing.c, sympy.printing.fortran, and sympy.printing.cxx, respectively. This was done to avoid conflicts that occur when a module name is the same as a function name. The modules are still importable under their old names but doing so is deprecated and a warning will be given (#19908 by AATTasmeurer)
* from sympy.printing.codeprinter import Assignment no longer works. You should use from sympy.codegen import Assignment, which is where Assignment has lived since SymPy 1.1. (#19908 by AATTasmeurer)
* Calling preview with viewer=\"file\" no longer looks for a file executable (a regression in 1.6.0) (#19905 by AATTeric-wieser) solvers
* solve_linear_system is now a thin wrapper for linsolve. It is recommended to use linsolve in new code. solve_linear_system maybe deprecated or removed in future. (#18814 by AATToscarbenjamin) utilities
* find_executable is deprecated in favor of the builtin shutil. which. (#19634 by AATTeric-wieser) Changes - ------ algebras
* Added DocString for integrate function of quaternion class. (#19410 by AATTmohitshah3111999) codegen
* Added support for generating calls to scipy.special.cosm1. (#20011 by AATTbjodah)
* sympy.codegen and sympy.combinatorics are no longer imported as part of from sympy import
*. The codegen and combinatorics modules do not have any names that are included in the top-level namespace, so their being imported with the top-level SymPy was a mistake. This improves the import time of from sympy import
*. (#19908 by AATTasmeurer)
* Added support for generating calls to numpy.logaddexp & numpy. logaddexp2. (#19880 by AATTbjodah)
* Fix bugs to the parser of matrix expressions in order to build CodegenArray objects correctly. (#19197 by AATTUpabjojr) combinatorics
* Fixed a bug in PermutationGroup.minimal_blocks caused by modifying a list while iterating over its indices. (#19954 by AATTilya-pchelintsev) concrete
* Implemented Raabe\'s Test (#18656 by AATTsachin-4099) core
* Fixed a few broken cases of expr.is_integer (#20450 by AATTcoproc and AATTtbennun)
* Modules and names that were accidentally importable from sympy are no longer importable. In sympy 1.6 importing and using these names would give a deprecation warning. In sympy 1.7 these names are removed. As an example from sympy import add would need to be from sympy.core import add or import sympy. core.add as add. (#19554 by AATToscarbenjamin)
* Zero raised to power Negative Infinity gives ComplexInfinity (zoo) instead of zero (#20212 by AATTsidhu1012)
* Extensible add, mul and power functions are introduced to allow sympy objects to define what classes should be used for them in place of Add, Mul and Pow (e.g. matrices use MatAdd). This is an experimental approach aimed at enabling the behaviour of core routines (expand, collect, etc) to be customised by user-defined types (e.g. MatAdd rather than Add). This mechanism is still experimental, is not fully implemented across the core and might be changed or removed in a future release of sympy. (#19463 by AATTJSS95 and AATTmcpl-sympy)
* divmod on sympy.Float with 0 numerator now results in (0, 0). (#20109 by AATTeriknw)
* Dict operations no longer automatically converts strings into SymPy types. (#19911 by AATTasmeurer)
* Dict operations no longer raise SympifyError. (#19911 by AATTasmeurer)
* Fixes _eval_nseries() function of power.py (#19508 by AATTsachin-4099)
* Remove optional dependency on fastcache (#19492 by AATTpbrady)
* DEPRECATION: Using non-Expr args in Add, Mul or Pow is now deprecated (#19445 by AATToscarbenjamin)
* When creating an Add or Mul with evaluate=False identities (0 or 1) are no longer removed. (#19450 by AATToscarbenjamin)
* Fixes _eval_nseries() function of mul.py (#19369 by AATTsachin-4099)
* Sum is now included in count_ops results (#19261 by AATTsmichr)
* match has been optimized to improve term-matching in Add (#19261 by AATTsmichr)
* match will automatically ignore bound symbols when matching (#19261 by AATTsmichr)
* match results will no longer contain extraneous symbols (only those requested) (#19261 by AATTsmichr)
* as_dummy should give a canonical result for expressions having bound symbols (#19261 by AATTsmichr)
* Lambdas written in terms of different symbols will no longer compare equal; this was an abuse of the Python == operator (#19261 by AATTsmichr)
* expr: A new method is_meromorphic is added. (#19306 by AATTjksuom) diffgeom
* Manifold.patches attribute is deprecated. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* Patch.coord_systems attribute is deprecated. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* Class signature names of CoordSystem is deprecated. CoordinateSymbol class and CoordSystem.symbols attribute are introduced instead. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* CoordSystem.transforms, CoordSystem.connect_to, and CoordSystem.coord_tuple_transform_to are deprecated. Class signature relations, CoordSystem.transformation and CoordSystem.transform are introduced instead. (#19368 by AATTJSS95 and AATTmcpl-sympy)
* CoordSystem.jacobian_determinant method is introduced. (#19368 by AATTJSS95 and AATTmcpl-sympy) functions
* lambdify added a warning when args is a set. (#19792 by AATTfoice, AATTRobertoFranceschini, and AATTsylee957)
* Fixes _eval_nseries method of log (#20002 by AATTsachin-4099)
* Adds _eval_is_meromorphic method and _eval_aseries to class lowergamma (#19990 by AATTsachin-4099)
* Adds _eval_is_meromorphic method and _eval_rewrite_as_tractable method to class uppergamma (#19990 by AATTsachin-4099)
* Rectifies eval method of class besselk (#19990 by AATTsachin-4099)
* Adds _eval_is_meromorphic to bessel function. (#19963 by AATTsachin-4099)
* Adds _eval_nseries function to sin and cos. (#19916 by AATTsachin-4099)
* reduced symbolic multiples of pi in trigonometric functions (#19741 by AATTsachin-4099)
* fixed errors in assumptions when rewriting RisingFactorial / FallingFactorial as gamma or factorial (#18696 by AATTsachin-4099)
* Adds _singularities to LambertW function (#19716 by AATTsachin-4099)
* Rectifies _eval_rewrite_as_tractable method of class erf (#19697 by AATTsachin-4099)
* Improved condition checking in piecewise_simplify() (#19596 by AATTdhruvmendiratta6 and AATTsmichr)
* Implemented _eval_rewrite_as_Abs() for sign (#19487 by AATTdhruvmendiratta6)
* Adds cdir parameter to handle series expansions on branch cuts (#19555 by AATTsachin-4099)
* Adds _eval_rewrite_as_factorial() and _eval_rewrite_as_gamma() functionalities for subfactorial (#19515 by AATTsachin-4099)
* Fixed cot.as_real_imag (sign error in imaginary part) (#19468 by AATTDaveWitteMorris and AATTgschintgen)
* Corrects the _eval_as_leading_term() method of tan and sec functions (#19461 by AATTsachin-4099)
* bsplines are more robust in terms of handling symbolic knots (#19272 by AATTsmichr) geometry
* Ellipses with eccentricity >=1 and for eccentricity < 0 will be handled as trivial cases (#20045 by AATTagrawalshubham01) integrals
* upgrades to manualintegrate to support inverse trig functions! (#19993 by AATTiammosespaulr) interactive
* The _repr_latex_, _repr_svg_, and _repr_png_ methods of subclasses of sympy objects are no longer discarded when init_printing() is called. (#19944 by AATTeric-wieser) logic
* Binary boolean operators on Boolean objects no longer coerce strings (#20093 by AATTeric-wieser) matrices
* Adding an array and a matrix now consistently gives TypeError. (#20159 by AATTsidhu1012)
* changed subs function to check if input is zip (#19159 by AATTczgdp1807 and AATTgfolbe318)
* added tests in test_commonmatrix.py (#19159 by AATTczgdp1807 and AATTgfolbe318)
* The ordering of parameters in a parametrised solution from gauss_jordan_solve was fixed. Previously incorrect results were returned for some underdetermined systems. (#19885 by AATT1124816)
* Prevents infinite recursion with rmul (#19860 by AATTmloubout)
* Added class MatrixSet to represent the set of matrices (#19826 by AATTSmit-create)
* Disabled default matrix intermediate product simplification and changed it to enable via context manager. (#19588 by AATToscarbenjamin and AATTPristine-Cat)
* Use more efficient Cholesky factorization method to check if matrices are positive semidefinite. (#19573 by AATTgalbwe)
* row_del and col_del will raise IndexError rather than ValueError when the index is out of bounds. (#19571 by AATTsylee957)
* Fixed a bug in the implementation of Sylvester\'s criterion for determining if a matrix is positive semidefinite. (#19556 by AATTgalbwe)
* Explicit non-matrix are treated as scalar (#19533 by AATTmloubout)
* QRdecomposition will return matrices with zero rows and columns for zero rank matrices. e.g. Matrix([[0, 0, 0], [0, 0, 0], [0, 0, 0]]) will be decomposed with Matrix(3, 0, []) and Matrix(0, 3, []) (#19319 by AATTsylee957)
* Added Matrix.companion for creating dense companion matrix. (#19339 by AATTsylee957)
* Added CompanionMatrix for creating a symbolic companion matrix. (#19339 by AATTsylee957)
* Matrix([]).eigenvals(multiple=True) will give an empty list instead of an empty dict. (#19355 by AATTsylee957)
* Determinant is now considered commutative. (#19354 by AATTeric-wieser) ntheory
* Integrated Lenstra\'s Elliptic Curve factorization into factorint (#19937 by AATTabh2k)
* Added quadratic sieve (#19657 by AATTabh2k)
* Implemented Lenstra\'s Elliptic curve factorization and Elliptic curve primality test (#19436 by AATTabhinav28071999) parsing
* Added support for while loop in C Parser (#20188 by AATTsmitgajjar)
* Upgraded Relational Operator support (#19982 by AATTiammosespaulr)
* Bra-Ket Notation support (#19982 by AATTiammosespaulr)
* Improved Grammar (#19982 by AATTiammosespaulr)
* added Latex support for \"not equal\" and expanded support for less than, greater than symbols (#19970 by AATTbhpayne)
* parse_latex supports \\left and \\right parenthesis notation. (#19466 by AATTsylee957)
* parse_latex can parse expressions with amsmath spacing (#19475 by AATTsylee957)
* Added parsing of \\exp in parse_latex. (#19395 by AATTsylee957)
* Add more parsing rules and test examples. (#19177 by AATTwuyudi)
* Added support for more data types in C parser: signed char, unsigned char, short, short int, signed short, signed short int, unsigned short, unsigned short int, unsigned int, long, long int, signed long, signed long int, unsigned long, unsigned long int, double, long double. Also, modified the data type for int and float to intc and float32 respectively, replacing integer and real (#19230 by AATTsmitgajjar)
* Added support for shorthand operators in C parser: +=, -=,
*=, /= and %= (#19230 by AATTsmitgajjar)
* Removed the assumption of value of a variable, if it is not initialized while variable declaration(e.g.; in case of int a; , the value of a was assumed to be Integer(0), in case of float b;, the value of b was assumed to be Float(0.0) and in case of bool c;, the value of c was assumed to be S.false). Also, removed the assumption of default value of formal parameters while parameter declaration in function definition or function prototype (e.g.; in case of function definition void func(int a, float b) { //some code }, default value of formal parametersa and b were assumed to be Integer(0) and Float(0.0) respectively) (#19230 by AATTsmitgajjar) physics.control
* Added dc_gain, poles, zeros, and is_stable in TransferFunction class. (#19896 by AATTnamannimmo10)
* Adding a new control systems toolbox as physics.control. (#18436 by AATTbenepla and AATTnamannimmo10)
* Add TransferFunction, Series, Parallel, and Feedback class for physics.control submodule (#19390 by AATTbenepla and AATTnamannimmo10) physics.quantum
* Simplification of Dagger()
* IdentityOperator() (#19783 by AATTdhruvmendiratta6)
* When printing, Commutator, Anticommutator, InnerProduct, TensorProduct, and OuterProduct now respect keyword-arguments to sstr. (#19424 by AATTeric-wieser) physics.units
* Fixed some dimensional analysis bugs with the addition and multiplication operators. (#19705 by AATTmgreminger) physics.vector
* Added user warnings for all possible paths are found in particle.py. (#20131 by AATTsidhu1012)
* Added user warning for cyclic paths in particle.py. (#20131 by AATTsidhu1012)
* Point.vel() now attempts to calculate the velocity using the relative position from other points if it has not been already set by the user. This behavior mimics the existing behavior in ReferenceFrame.ang_vel_in(). (#20049 by AATTmoorepants and AATTsidhu1012)
* VectorLatexPrinter now respects the symbol_names setting when printing dynamicsymbols (#19684 by AATTeric-wieser)
* VectorLatexPrinter now know about the same trig functions as the regular printer (#19684 by AATTeric-wieser)
* When printing, Vector and Dyadic now respect keyword-arguments to sstr and latex. As a result, these no longer use vector printing customizations unless init_vprinting has been called. (#19640 by AATTeric-wieser) plotting
* capability to subclass Basebackend and specify it to the plotting functions, thus creating plots with other plotting libraries (#20463 by AATToscarbenjamin)
* Fixed plot3d_parametric_line plotting curves out of the box. (#19252 by AATTsylee957) polys
* Polys with complex floating point coefficients will now use the CC domain rather than EX. (#20194 by AATToscarbenjamin)
* Fixed a bug in minimal_polynomial when using Groebner bases (compose=False) (#19799 by AATTcoproc)
* Fixed GeneratorsError for creating some elements of FractionField when its ground domain is FractionField or PolynomialRing. (#19713 by AATTsylee957)
* Fixed Poly initialized with PolyElement mutating the generator of the coefficient in the form of polynomial. (e.g. Poly(ZZ[x] (x+1), y, domain=ZZ[x]) becomes Poly(y+1, y, domain=ZZ[x])) (#19659 by AATTsylee957)
* Fixed Poly initialized with FracElement raising SympifyError. (e.g. dom = ZZ.frac_field(x); Poly(dom(x+2), y, domain=dom)) (#19659 by AATTsylee957)
* Add division to finite extensions. (#19593 by AATTgschintgen and AATTjksuom)
* Fixed GCD to always return a non-negative constant. (#19569 by AATTKaustubhDamania)
* added new domains for Gaussian integers and rationals (#15396 by AATTjksuom and AATTsmichr)
* Add the Gaussian domains ZZ_I and QQ_I to Poly. Make Poly use the Gaussian domains automatically when I is present in the input. Add factorisation over the Gaussian integers (ZZ_I). The polys keyword argument gaussian=True now results in the domain QQ_I rather than the extension field QQ. (#15396 by AATToscarbenjamin)
* improvement of dup_zz_mignotte_bound(f, K) by Knuth-Cohen bound (#19254 by AATTlagamura) printing
* Support frac with pycode printers (for lambdify) (#20115 by AATTehren)
* Round-trip printing of floats (double-precision) to content MathML. (#19958 by AATTlcontento)
* latex now once again requires settings to be passed as keyword and not positional arguments, and respects printer settings changed with set_global_settings; restoring the behavior from sympy 1.2 and earlier. (#20067 by AATTeric-wieser)
* sympy.printing.pretty.pretty_symbology.xstr has been deprecated (#20081 by AATTeric-wieser)
* The unicode argument to sympy.printing.stringpict.prettyForm has been deprecated (#20081 by AATTeric-wieser)
* The unicode attribute of sympy.printing.stringpict.prettyForm has been deprecated (#20081 by AATTeric-wieser)
* The mpmath code printer now correctly prints the loggamma function. (#19913 by AATTabhaydhiman)
* Use literal suffix for 1.0 in C89CodePrinter\'s printing of pow when the exponent is -1 (#19956 by AATTbjodah and AATTmmohrhard)
* The modules sympy.printing.ccode, sympy.printing.fcode, and sympy.printing.cxxcode have been renamed to sympy.printing.c, sympy.printing.fortran, and sympy.printing.cxx, respectively. This was done to avoid conflicts that occur when a module name is the same as a function name. The modules are still importable under their old names but doing so is deprecated and a warning will be given (#19908 by AATTasmeurer)
* from sympy.printing.codeprinter import Assignment no longer works. You should use from sympy.codegen import Assignment, which is where Assignment has lived since SymPy 1.1. (#19908 by AATTasmeurer)
* Calling preview with viewer=\"file\" no longer looks for a file executable (a regression in 1.6.0) (#19905 by AATTeric-wieser)
* The deprecation of calling preview with viewer=\"StringIO\" is now expired instead of forgotten (a regression in 1.6.0) (#19905 by AATTeric-wieser)
* When printing, NDimArray now respects keyword-arguments to sstr (#19903 by AATTeric-wieser)
* preview no longer fails with ValueError if the preamble contains a % character. (#19858 by AATTeric-wieser)
* Types which are not recognized by the LaTeX printer no longer have their __str__ interpreted as LaTeX, and have their str(... ) printed as pre-formatted text as if they were printed normally. This includes the builtin str type: latex(\"hello\") now results in the latex \\mathtt{\\text{hello}}.
* If a custom type intends to be interpreted as latex, it should define the _latex hook as described in the docs: def _latex(self, printer): return str(self) # indicate that the result of __str__ is LaTeX-compatible
* To print a string containing LaTeX math using MathJax, use import IPython IPython.display.Math(string) (#19611 by AATTeric-wieser)
* The latex printer now shows builtin floats using ...x10^... notation instead of ...e... notation. (#19611 by AATTeric-wieser)
* preview now throws OSError instead of SystemError if viewers cannot be found. (#19818 by AATTeric-wieser)
* Fixed the SciPy printer for sparse matrices (#19633 by AATTbenjaminwolba and AATTsylee957)
* preview(..., output=\'pdf\') now uses dvipdfmx instead of dvipdf if available. As a result, it now works with a MiKTeX installation on windows. (#19635 by AATTeric-wieser)
* LatexPrinter._print is no longer called on strings which have already been converted to Latex. (#19614 by AATTeric-wieser)
* A new sympy.printing.defaults.Printable base class was added, which is a mixin providing _repr_latex_ in terms of LatexPrinter().doprint(). Any user type which subclasses this will opt into init_printing. (#19425 by AATTeric-wieser)
* Printing unevaluated Muls with multiple Number factors will show all factors strictly in order. Identities will also be shown explicitly. (#19450 by AATToscarbenjamin)
* user types that implement _latex are now printed as LaTeX when embedded within builtin collections like list or dict. (#19389 by AATTeric-wieser)
* fixed a bug where srepr function would not print dictionary and set properly (#19346 by AATTrational-kunal)
* tuples of one element now include the usual trailing comma (#19348 by AATTeric-wieser)
* mat_symbol_style=\'bold\' no longer applies to subscripts of matrix symbols (#19301 by AATTeric-wieser) series
* Adds e.is_Pow heuristic to limits.py to improve the limit evaluations of Pow objects (#19680 by AATTsachin-4099)
* Changes in mrv() function of gruntz.py and cancel() function of polytools.py resolves RecursionError and Timeout in limit evaluations (#19646 by AATTsachin-4099)
* modified order.py to better work with Add objects. (#19546 by AATTmaurogaravello)
* Adds a functionality to the doit() method of limits.py which uses is_meromorphic() for limit evaluations (#19432 by AATTsachin-4099)
* Fixed wrong computations of fourier_series for even or odd functions with limits that are specified non-central. (#19382 by AATTsylee957)
* Replaces xreplace() with subs() in rewrite() function of gruntz.py resolving incorrect limit evaluations (#19297 by AATTsachin-4099)
* Adds a condition to limitinf() function of gruntz.py resolving incorrect limit evaluations (#19292 by AATTsachin-4099) sets
* Earlier expr and sets were treated equal which gave incorrect output for some set functions(mainly : - in, is_subset), made sets and expr not to be equal (#20208 by AATTsidhu1012)
* nested multi-symbol first arg for ConditionSet now handled with subs/as_dummy (#19512 by AATTsmichr)
* the bound symbols cannot be replaced with subs (#19512 by AATTsmichr)
* the error checking for mismatched signatures for sym and the base set has been improved (#19512 by AATTsmichr)
* ConditionSet still tries to unify symbols and denest a base set that is given as a ConditionSet but will no longer introduce new symbols (and will leave the base set a a ConditionSet) when this cannot be done (#19512 by AATTsmichr)
* Fixed ConditionSet.dummy_eq() and ConditionSet.as_dummy(). (#19502 by AATTgschintgen)
* Fixed ConditionSet.subs() in the case where the substitution targets a free symbol. (#19495 by AATTgschintgen)
* Fixed _infimum_key sorting key. (#19437 by AATTgschintgen)
* ImageSets with Lambdas having different symbols will no longer compare equal and should be compared like a.dummy_eq(b) #19261 by AATTsmichr) simplify
* Fixed sqrtdenest giving wrong results for some forms of sqrt(a + b
*sqrt(r)) (#19932 by AATTsylee957)
* Fixes a bug in collect when collection keys are not independent. (#19720 by AATTmloubout)
* Improved simplification for sign() (#19596 by AATTdhruvmendiratta6 and AATTsmichr)
* Improved trigsimp for hyperbolic functions nested in non-trig functions. (#19548 by AATTgschintgen)
* Fixes a bug in collect when collected symbols appear in the facorized expression. (#19431 by AATTmloubout) solvers
* Added simplification strategies for simplifying the solutions of systems of ODEs (#19998 by AATTmijo2 and AATToscarbenjamin)
* Fix bug in nonlinsolve leading to key-error (#19189 by AATTnsfinkelstein and AATToscarbenjamin)
* improved functionality for solveset in case of inequalities (#19978 by AATTmaurogaravello)
* Handling of inequalities involving Piecewise is improved in solveset. (#19986 by AATTmaurogaravello)
* Solving higher-order system of ODEs by reducing/transforming it into the first-order system of ODEs by numerous methods. (#19838 by AATTmijo2)
* Added component division technique to divide the system of ODEs into logical sub-systems and solving each of these separately. (#19762 by AATTmijo2)
* Extending checkodesol and constants_renumber to handle system of ODEs (#19733 by AATTmijo2)
* Added dsolve_system that can solve a system of ODEs (#19695 by AATTmijo2)
* API for the _linear_neq_order1_type1-4 was changed to make it easier for anyone to access the solver (#19653 by AATTmijo2)
* Solving linear systems particularly involving polynomial coefficients is much faster (#18844 by AATToscarbenjamin)
* Added the new n equations linear first-order non-constant coefficient non-homogeneous solver where the coefficient matrix of the system of ODEs is commutative with its antiderivative. (#19594 by AATTmijo2)
* solveset will always use a symbol that has only either the real or complex attribute and no other attribute; when a ConditionSet is returned, the original symbol for which the solution is being sought will be used if it does not cause evaluation of the result. (#19512 by AATTsmichr)
* In dsolve there is no a general solver that can solve systems of constant coefficient non-homogeneous first order ODEs of any size in terms of integrals. (#19341 by AATTmijo2)
* Fixed exception handling in solveset\'s secondary trigonometric solver. (#19566 by AATTgschintgen)
* equations with an additive generator are now solved more quickly (#19524 by AATTsmichr)
* Improved solveset capabilities for solving trigonometric equations, notably rational and symbolic coefficients are now supported. (#19507 by AATTgschintgen)
* solve_linear_system is now a thin wrapper for linsolve. It is recommended to use linsolve in new code. solve_linear_system maybe deprecated or removed in future. (#18814 by AATToscarbenjamin)
* Addition of a solver that handles a subclass of linear first order non-constant coefficient homogeneous systems of ODEs with any number of equations. (#19185 by AATTmijo2) stats
* The state space of ContinuousMarkovChain is now by default a Range object instead of S.Reals. (#20150 by AATTczgdp1807 and AATTnaveensaigit)
* The generator matrix of ContinuousMarkovChain is now by default a MatrixSymbol object instead of None. (#20150 by AATTczgdp1807 and AATTnaveensaigit)
* RandomMatrixSymbol.doit will be invariant upon call. (#20136 by AATTsylee957)
* The state space of DiscreteMarkovChain is now by default a Range object instead of S.Reals. (#20042 by AATTMaelstrom6)
* The transition probability matrix of DiscreteMarkovChain is now by default a MatrixSymbol object instead of None. (#20042 by AATTMaelstrom6)
* Fixed xreplace infinitely expanding random matrix ensemble classes. (#20018 by AATTsylee957)
* All the ensemble classes (RandomMatrixEnsemble, GaussianEnsemble, GaussianOrthogonalEnsemble, ...) now becomes stub function constructors. If you want to use them as classes, you should import them as RandomMatrixEnsembleModel, GaussianEnsembleModel, ... (#20018 by AATTsylee957)
* Added sampling of Joint RVs from external libraries (#19848 by AATTSmit-create)
* Added sampling for Matrix Distributions (#19857 by AATTSmit-create)
* Allowing CompoundDistribution to handle more than one random variables (#19808 by AATTSmit-create)
* Added Wishart and MatrixNormal Distributions (#19795 by AATTSmit-create)
* Change in return type of P and E with evaluate=False. With evaluate=False, P and E are made to return Probability and Expectation object respectively. (#19819 by AATTSmit-create)
* Added MatrixGamma Distribution (#19734 by AATTSmit-create)
* Added symbolic classes of Moment and CentralMoment (#19724 by AATTSmit-create)
* Added support for Compound Distributions (#19648 by AATTSmit-create)
* Added doit in class Probability (#19696 by AATTSmit-create)
* Added MutlivariateNormal and MutlivariateLaplace function (#19631 by AATTSmit-create)
* Added Poisson, Wiener and Gamma Processes (#19387 by AATTSmit-create)
* Added Expectation Matrix, Variance Matrix and CrossCovariance Matrix (#19529 by AATTSmit-create)
* Added sample_stochastic for sampling from stochastic processes. (#19500 by AATTSmit-create)
* FIxes free_symbols method of RandomIndexedSymbol (#19459 by AATTSmit-create)
* Added Sampling from external libraries for all the random variables of sympy (#19342 by AATTSmit-create)
* Added doit method in Expectation and made E to call Expectation (#19290 by AATTSmit-create)
* Added is_random in sympy.stats.rv to check if expression contains random variables (#19304 by AATTSmit-create)
* expand added in sympy.stats.symbolic_rv API. (#19295 by AATTSmit-create)
* Added Lomax and Bounded pareto distribution (#19273 by AATTSmit-create)
* Added sampling methods for continuous variables (#18754 by AATTSmit-create)
* Added library option in sample (#18754 by AATTSmit-create)
* sample returns an iterator object since version 1.7 (#18754 by AATTSmit-create) tensor
* Adding ArrayDerivative class as subclass of Derivative. This new handles derivatives involving non-scalar expressions. (#20072 by AATTUpabjojr) utilities
* sympy.utilities.iterables.partitions() no longer reuses the same dictionary for each yielded output. (#20154 by AATTasmeurer)
* Add support for Integral with lambdify (using scipy or mpmath) (#20134 by AATTehren)
* Lambdifying an expression with loggamma using mpmath no longer raises ImportError. (#19913 by AATTabhaydhiman)
* find_executable is deprecated in favor of the builtin shutil. which. (#19634 by AATTeric-wieser) vector
* integral of parametric region depends on the order of limits at the time of initialization. (#20044 by AATTfriyaz)
* vector_integrate can integrate over ImplicitRegion objects. (#19883 by AATTfriyaz)
* Added a function to find a rational point on conic (#19807 by AATTfriyaz and AATTUpabjojr)
* Added support to create implictly defined regions. (#19681 by AATTfriyaz)
* Added support to integrate scalar/vector fields over objects of geometry module. (#19650 by AATTfriyaz)
* added class to represent integral of scalar/vector field over a parametric surface. (#19539 by AATTfriyaz)
* Modified API of ParametricIntegral class (#19580 by AATTfriyaz)
* Added class to represent a parametric region in space. (#19472 by AATTfriyaz) other
* The LaTeX docs now need to built with xelatex rather than pdflatex. (#20309 by AATToscarbenjamin)
* Support for Python 3.5 has been dropped. SymPy now requires Python 3.6 or newer. (#20145 by AATToscarbenjamin)
* more function raise TypeError when passed invalid keyword-arguments, rather than ignoring them silently (#20086 by AATTeric-wieser)
* assert sympy.testing.pytest.raises(Exception, func) no longer always asserts when pytest is not present (#20012 by AATTeric-wieser)
* Make SymPy do less at import time so that import sympy is faster. (#19910 by AATTasmeurer)
* Improve code quality by cleaning the doctests up (#19406 by AATTInCogNiTo124 and AATToscarbenjamin)
* intersphinx links to :mod:`sympy` no longer point to the documentation for Immutable Matrices (#19430 by AATTeric-wieser)
* Wed Sep 16 2020 Dirk Mueller - update to 1.6.2:
* bugfixes