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linear programming in cython

asked 2012-05-04 22:27:38 +0200

markus gravatar image

hi, i am trying to speed up a sage code in cython and i am having difficulties with calling the linear programming routine.

my algorithm requires me to solve a large number of linear programs. currently, i am doing this in sage by calling MixedLinearProgram inside a loop and updating variables depending on the solution.

is there a way to call that program inside a cython function? i would need a cython program that accepts arrays as inputs, solves a linear program and outputs an array.

many thanks for your help markus

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answered 2012-05-04 23:17:53 +0200

Volker Braun gravatar image

Presumably you have lots of relatively simple linear programs. Have a look at the PPL Cython interface in sage/libs/ppl.pyx, and in particular maximize()

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Thanks Volker! I think that is exactly what I need. I am new to Sage and Cython so it might take me a while but thanks for pointing me in the right direction. Also, do you have feeling for what time saving I can expect relative to MixedIntegerLinearProgam? Markus

markus gravatar imagemarkus ( 2012-05-05 00:34:45 +0200 )edit

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Asked: 2012-05-04 22:27:38 +0200

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Last updated: May 04 '12