# sympy

https://github.com/sympy/sympy

## Python

A computer algebra system written in pure Python

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## Help out

- Issues
- N rounding incorrectly
- diffgeom and higher-order derivatives
- Can't override division operator
- diff only evaluates sometimes
- bokeh plotting backend
- Limit of rational expression with hypergeometric function
- SOPform__int(), POSform__int() SUGGEST
- real_root formula doesn't work with lambdify
- NameError: name 'Ne' is not defined plotting real_root((log(x/(x-2))), 3)
- trigsimp should simplify complex exponentials
- codegen matrix arguments
- Lambdify now handles symbols with invalid Python identifiers.
- Fix everload max recursion deep by Add _eval_is_positive()
- Changed Printing of Logic Expressions
- Poly.subs() returns an expression instead of a Polynomial
- Interval.is_EmptySet not defined.
- parse_expr(u'Abs(x+x)' , evaluate=False) reduces to 2*Abs(x). For me this is very bad
- parse_expr(u'custom(x+x) + 1' , evaluate=False) crashes sympy
- Stuck in loop while printing complicated `Sum`
- Fifth order equation with complex coefficients not solved

- Docs