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  1. jabla71

    Which solver can deal with Lagrange multipliers?

    I am trying to figure out which solver (Fortran) will be able to calculate eigenvalues for a matrix that has been augmented with Lagrange multipliers. Basically I have a FEM model with 20node solids and 4node plates that are coupled with Lagrange multies in a inhouse FE program. I have been...
  2. jabla71

    Which Solver can do eigenvalues with Lagrande multipliers

    I am trying to figure out which solver (in Fortran) will be able to calculate eigenvalues for a matrix that has been augmented with Lagrange multipliers. Basically I have a FEM model with 20node solids and 4node plates that are coupled with Lagrange multies in a inhouse FE program. I have been...

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