[Python-Dev] Matrix product

[daniel.stutzbach at gmail.com]

The desire for a new operator for matrix mutltiplication is because
binary prefix operators are horrible for expressin this kind of thing,
right?

Stuff like this is hard to write, read, and debug (especially when
checking it against an infix formula):

mmul(mmul(mmul(a, b), c), d)

How about just making a matrix multiply function that can take many
arguments?  I think this is pretty readable:

mmul(a, b, c, d)

Additionally, mmul could then optimize the order of the
multiplications (e.g., depending the dimensions of the matrices, it
may be much more efficient to perform a*((b*c)*d) rather than
((a*b)*c)*d).

(please forgive typos--writing this on a smartphone)

--
Daniel Stutzbach