| commit | 17d0ad249c39637a82bb993f560c6754aa7a137c | |
| author | Kirill Smelkov <kirr@landau.phys.spbu.ru> | |
| Sat, 16 Aug 2008 20:56:44 +0000 (17 00:56 +0400) | ||
| committer | Kirill Smelkov <kirr@landau.phys.spbu.ru> | |
| Sat, 16 Aug 2008 20:56:44 +0000 (17 00:56 +0400) | ||
| tree | c11d24cd5fb0f8958846c2aeede379be913284f5 | treesnapshot (tar.gz zip) |
| parent | 96dc509bbb4cc75426110181117fc619a1503d71 | commitdiff |
Derivative: fix .subs(self, something)
it used not to recognize it should do the substitution:
In [1]: d = f(x).diff(x)
In [2]: d
Out[2]:
d
──(f(x))
dx
In [3]: d.subs(d, y)
Out[3]:
d
──(f(x))
dx
Out[3] is wrong -- should be y
Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru>
Signed-off-by: Ondrej Certik <ondrej@certik.cz>
it used not to recognize it should do the substitution:
In [1]: d = f(x).diff(x)
In [2]: d
Out[2]:
d
──(f(x))
dx
In [3]: d.subs(d, y)
Out[3]:
d
──(f(x))
dx
Out[3] is wrong -- should be y
Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru>
Signed-off-by: Ondrej Certik <ondrej@certik.cz>
| sympy/core/function.py | diffblobblamehistory | |
| sympy/core/tests/test_functions.py | diffblobblamehistory |