[Numpy-discussion] ANNOUNCE: PySymbolic - Doing Symbolics in Python

Pearu Peterson pearu at ioc.ee
Tue Oct 10 12:42:38 CDT 2000


Hi!

I have started a project

  PySymbolic  - "Doing Symbolics in Python"

PySymbolic is a collection of tools for doing elementary symbolic
calculations in Python. The project is in alpha stage.

Current features include basic simplifications:
      *** removing redundant parenthesis: (a) -> a
      *** applying factorization: -(a) -> -a, +a -> a, ~(a) -> ~a
      *** collecting terms: n*a+b+m*a -> k*a+b (where k=n+m)
      *** collecting powers: a**c*b/a**d -> a**(c-d)*b
      *** cancellations: 0*a -> 0, a+0 -> 0, 
                         a**0 -> 1, 1*a -> a, a**1 -> a
      *** rational arithmetic: 3/4+2/6-1 -> 1/12 
      *** opening parenthesis: (a+b)*c -> a*c+b*c
      *** expanding integer powers: (a+b)**n -> a**n+a**(n-1)*b+...
      *** sorting terms in alphabethic order: a+c+b -> a+b+c
      *** (more to come)

Projects homepage is
    http://cens.ioc.ee/projects/pysymbolic/

You can download the source from
    http://cens.ioc.ee/projects/pysymbolic/PySymbolic.tgz

Regards,
	Pearu




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