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view +util/matrixborrow.m @ 884:7d4f57725192 feature/poroelastic

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Add a getBoundaryOperator method in multiblock.DiffOp that uses the the diffop get_boundary_operator method rather than its properties. Werpers might not like this.
author Martin Almquist <malmquist@stanford.edu>
date Fri, 02 Nov 2018 10:47:03 -0700
parents 48b6fb693025
children
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function alpha = matrixborrow(A,B)

    function y = neg(x)
        y = min(eig(A-x*B));
    end


    x0 = 1;
    while neg(x0) > -1
        x0 = 2*x0;
    end

    opt = optimset('Display','none');
    alpha = fsolve(@neg, x0,opt);
end