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D.3.1.13 unitmat
Procedure from librarymatrix.lib (see matrix_lib).
- Usage:
- unitmat(n); n integer >= 0
- Return:
- nxn unit matrix
- Note:
- needs a basering, diagonal entries are numbers (=1) in the basering
LIB "matrix.lib"; ring r=32003,(x,y,z),lp; print(xyz*unitmat(4)); ==> xyz,0, 0, 0, ==> 0, xyz,0, 0, ==> 0, 0, xyz,0, ==> 0, 0, 0, xyz print(unitmat(5)); ==> 1,0,0,0,0, ==> 0,1,0,0,0, ==> 0,0,1,0,0, ==> 0,0,0,1,0, ==> 0,0,0,0,1 |