Hi,
>From what I can tell, Sage lacks an explicit function to compute
implicit derivatives, akin say to Maple's implicit_diff command. See
this (really) old thread:
http://groups.google.com/group/sage-devel/browse_thread/thread/f374f76bb3cd0361
Is this still the current situation? I've written one that seems to
work; something to the effect of
sage: var('y')
y
sage: implicit_diff(x**2 + y**2 = x*y, y, x)
(x - 2*y)/(2*x - y)
sage: implicit_diff(x**2 + y**2 = x*y, x, y)
(x - 2*y)/(2*x - y)
I'd be happy to open a ticket with the code & some documentation if
someone can suggest a location where to put it.
regards
john perry
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