Is there a problem forgetting assumptions. Or do I not understand how
this is supposed to work ...
[m...@puddleglum ~]$ sage
----------------------------------------------------------------------
| Sage Version 4.2, Release Date: 2009-10-24 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: n=var('n')
sage: assumptions()
[]
sage: foo=sin((-1)*n*pi)
sage: foo.simplify()
-sin(pi*n)
sage: assume(n, 'odd')
sage: assumptions()
[n is odd]
sage: foo=sin((-1)*n*pi)
sage: foo.simplify()
0
sage: forget(n, 'odd')
sage: assumptions()
[]
sage: foo=sin((-1)*n*pi)
sage: foo.simplify()
0
sage:
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