Similarly to the fJ, the function d=fJt(a,b,c) computes the matrix:

    \[d=\left(\begin{array}{c}0_{b\times a}\\I_a\\0_{c\times a}\end{array}\right).\]

  • If c is not specified, then it is assumed to be zero
  • If only a is specified, then c is assumed to be zero and b=a.

Note: The difference between the function fJ and fJt is that the roles of b and c are interchanged.

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