Nate MacFadden
String theorist who likes linear/quadratic programming
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Activity overview
Latest activity by Nate MacFadden-
Nate MacFadden commented,
Hi Riley,Thanks for the great thoughts and references - your reply demonstrates a lot of functionality that I didn't know was possible! Wonderful! The invertibility sounds really good. It looks lik...
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Nate MacFadden created a post,
Matrix Invertibility and Some Minimums
AnsweredI have two things that I want to be able to efficiently model in Gurobi for my research: matrix invertibility getting the smallest and second smallest non-zero element from a list. I have partial...
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Nate MacFadden created a post,
Efficient Feasibility Checking of SBBD Matrices
I have a collection of singly-bordered-block-diagonal matrices. That is, each SBBD matrix looks like:H = [H_0 ... C_0; H_1 ... C_1; H_2 ...
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Nate MacFadden commented,
Hello Jaromił,Unfortunately, I lost my drafted response. I will recreate it here. First, please note an error in my previous message: the hyperplane constraints can have other integer values, but s...
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Nate MacFadden created a post,
Improving Performance on 'Easy' Problems
AnsweredI am new to Gurobi, so please excuse any naive mistakes. In my research, I must solve a collection of 'easy' feasibility problems: given a (non-pointed, convex) cone defined by m~=1500 (sparse) hyp...