Nate MacFadden

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String theorist who likes linear/quadratic programming

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Recent activity by Nate MacFadden Recent activity Votes

  • Matrix Invertibility and Some Minimums

    Answered

    I 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...

    Nate MacFadden Edited 2 followers 3 comments 1 vote

  • 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 ...

    Nate MacFadden Edited 1 follower 0 comments 0 votes

  • Improving Performance on 'Easy' Problems

    Answered

    I 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...

    Nate MacFadden 2 followers 3 comments 0 votes