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The mysterious 2skew function

  1. Nov 30, 2013 #1
    Hello,

    Background:
    I was going to implement an implicit approach to 3d tetrahedra deformations (first in Matlab then in C++).
    I need the Jacobian for the partial derivative of force wrt position to do this.
    I found this paper that gives a method for computing it:
    http://www-bcf.usc.edu/~jbarbic/BarbicExactCorotationalFEMStiffnessMatrix.pdf

    The Question:
    In the report, he defines a 2skew function (to the right of the page). I'm pretty confused on what it means. I think I forgot what skew means from linear algebra - that's probably part of my problem. It sounds like skew symmetric means that a negated matrix is equal to its transpose. What exactly is this 2skew function for?
     
  2. jcsd
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