Comment #2 on issue 4000 by [email protected]: Geometric Algebra -
gradient of an exponential
http://code.google.com/p/sympy/issues/detail?id=4000
See revised program bug_grad_exp.py. The only real mistake is that exp is
a member function for multivectors so that instead of exp(A) you must write
A.exp(). Also exp() only works if A*A is a scalarn (which in your case it
is). The result looks messy since you did not declare your scalar
variables to be real. Actually this makes things worse since sympy does
not know that t and E are > 0 so the squares inside the square roots are
not simplified.
Attachments:
bug_grad_exp.pdf 85.9 KB
bug_grad_exp.py 1.3 KB
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