Comment #12 on issue 1905 by julien.r...@gmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
It doesn't subclass from Expr.
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Comment #11 on issue 1905 by asmeu...@gmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Does MV subclass from Expr? Usually the logic itself is in _eval_deriative,
and diff() and .diff() call it automatically from the superclass.
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Comment #10 on issue 1905 by julien.r...@gmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
It's described in sympy/core/function.py (see the Derivative class) and for
MV I think it would just be
def _eval_derivative(self, x):
return
Comment #9 on issue 1905 by abro...@verizon.net: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
OK F.diff(x) refers to the partial derivative and there is only one
partial derivative so that could be made consistent with the rest of
sympy. I will l
Comment #8 on issue 1905 by julien.r...@gmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Certainly the same ambiguity exists for F.diff(x), but a choice was made
and diff(F, x) would mean the same as what F.diff(x) currently means. Or
e
Comment #7 on issue 1905 by abro...@verizon.net: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
The question is which derivative should diff mean. If F is a
multivector function and grad is the derivative operator then
grad*F, F*grad, grad^F, F^gr
Updates:
Status: Valid
Comment #6 on issue 1905 by julien.r...@gmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
It should be better integrated with SymPy's diff() by defining the
appropriate _eval_derivative stuff.
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Comment #5 on issue 1905 by abro...@verizon.net: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
I 'A' is a multivector function do not use diff(A,x) since diff is not part
of the GA
module and does not test to see if A is a multivector. Use A.dif
Comment #4 on issue 1905 by jdeko...@hotmail.com: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Thanks for answering so quickly to my issue, but I don't quite understand
what I should do.
First comment,
"Both diff(y,x) and exp(y) are not defi
Comment #3 on issue 1905 by abro...@verizon.net: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Also in your case gamma_x**2 = -1 so that exp(x*gamma_x) =
cos(x)+sin(x)*gamma_x and
d/dx(exp(x*gamma_x)) = -sin(x)+cos(x)*gamma_x. If gamma_x**2 = 1
Comment #2 on issue 1905 by abro...@verizon.net: Differentiation and
Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Both diff(y,x) and exp(y) are not defined in the galgebra module for y a
multivector.
If y is a multivector and y*y is a scalar then exp(y) can be expr
Updates:
Cc: abro...@verizon.net
Comment #1 on issue 1905 by asmeurer: Differentiation and Geometric Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
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New issue 1905 by jdeko...@hotmail.com: Differentiation and Geometric
Algebra
http://code.google.com/p/sympy/issues/detail?id=1905
Two different ways to do the same thing don't give the same result.
Here is the code sample in order
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