34.6 KroneckerProduct

KroneckerProduct( mat1, mat2 )

KroneckerProduct returns the Kronecker product of the two matrices mat1 and mat2. If mat1 is a m by n matrix and mat2 is a o by p matrix, the Kronecker product is a m*o by n*p matrix, such that the entry in row (i1-1)*o+i2 at position (k1-1)*p+k2 is mat1[i1][k1] * mat2[i2][k2].

    gap> mat1 := [ [ 0, -1, 1 ], [ -2, 0, -2 ] ];;
    gap> mat2 := [ [ 1, 1 ], [ 0, 1 ] ];;
    gap> PrintArray( KroneckerProduct( mat1, mat2 ) );
    [ [   0,   0,  -1,  -1,   1,   1 ],
      [   0,   0,   0,  -1,   0,   1 ],
      [  -2,  -2,   0,   0,  -2,  -2 ],
      [   0,  -2,   0,   0,   0,  -2 ] ] 

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