Assumptions on symbolic functions
I have a symbolic function f = function('f')(x). Is there a way to assume it is real and get abs(exp(I*f)) = 1?
None at the moment, as far as I know.
Note however that :
maxima
has such a facility (see maxima.declare?
) ;Sympy
has such a facility (it even has two, the newer progressively replacing the older) ;sage
handles assumptions and tests thereof, and these bugs are worked on.You might try to isolate the part of your computations where you need such a handling, do them in maxima or Sympy, and reimport the relevant results.
Note also that you can
assume(f(x)>0)
But that won't do a thing about bool(f(2*x+1)>0)
...
Asked: 2018-03-16 13:39:00 +0200
Seen: 351 times
Last updated: Mar 17 '18