Forum Discussion
Bug report: addVariable() has quadratic time complexity on QCQP's
Hi, I'm using the Python API of Xpress and I noticed that addVariable() has quadratic time complexity when the problem is a QCQP. This code here demonstrates the issue: import timeit
def create_...
Hi, it's understandable that some modifications can't be made in bulk, so your workaround is for now ideal.
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Is it possible to disable the implicit factor of 0.5 in the optimization objectives quadratic part?
Through trial and error, I figured out, that the XPress optimizer is using an implicit factor of 0.5 in the quadratic part of the optimization objective (which doesn't show up in the mps dumps btw.) ...