KASH3 Ref - RemoveRowColumn

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| ### Function RemoveRowColumn ( elt-alg^mat A, elt-ord^rat i, elt-ord^rat j ) -> elt-alg^mat ### Description The matrix derived from A by removing row i and column j. ### Examples x_m := Matrix(Z,3,3,[2,-3,5,7,3,4,5,6,7]); RemoveRowColumn(x_m, 1, 1);
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