# sympy

https://github.com/sympy/sympy

## Python

A computer algebra system written in pure Python

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## Help out

- Issues
- Fatal Python error: Cannot recover from stack overflow
- SymPy stats expansion
- add Stefanâ€“Boltzmann constant
- Pattern matching on UnevaluatedExpr
- Runtime error encountered in testing of sympy/utilities/tests/test_lambdify.py
- at least one of the definitions of cosine integral (Ci) is not recognised as cosine integral
- recreatable Dummy, simplified
- Fixing Systems in ODE.py
- can solve for more than one variable in solveset
- Solveset without specifying any independent variable
- NameError: name 'select' is not defined
- Use mpmath to compute numerical SVD (for Matrix of Floats)
- Matrix Printing: Fix printing errors in Matrix Symbol and subs()
- Sympy can't solve simple differential equation
- Codegen: sign function in Fortran
- vector : Add Laplacian function
- solve() and solveset(): equations with non-commutative symbols
- Fixes #11459: Allows representation of complex exponentials as trigonometric functions
- solve(M*x + N*y, x) fails for non-commutative symbols
- How to convert sympy expression into a postfix expression?

- Docs