Manuel Bröchin

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Latest activity by Manuel Bröchin
  • Manuel Bröchin created a post,

    Scaling jeopardizes Simplex convergence


    Hi, We're solving energy system models (often LPs without integrality constraints) and we're trying to improve the numerical properties of these models by scaling the input values. The scaling appr...

  • Manuel Bröchin commented,

    I'm not an expert but it seems you are solving a mixed-integer LP (MILP). Indications for this are that in the log it says "Root barrier log..." and "Root crossover log...". I don't know exactly wh...

  • Manuel Bröchin created a post,

    barrier and crossover restart


    I'm trying to solve an energy system model with ~2*10^6 rows and columns and ~7*10^6  non-zeros (after presolve) with barrier and crossover on gurobi 8.1.1.. The problem seems to have a large numer...