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D.3.1.26 rm_unitcol
Procedure from library matrix.lib (see matrix_lib).
- Usage:
rm_unitcol(A); A matrix (being row-reduced)
- Return:
matrix, obtained from A by deleting unit columns (having just one 1 and else 0 as entries) and associated rows
Example:
LIB "matrix.lib"; ring r=0,(A,B,C),dp; matrix m[6][8]= 0, 0, A, 0, 1,0, 0,0, 0, 0, -C2, 0, 0,0, 1,0, 0, 0, 0,1/2B, 0,0, 0,1, 0, 0, B, -A, 0,2A, 0,0, 2C,-4C, -A, B, 0,B, 0,0, 0, A, 0, 0, 0,0, 0,0; print(rm_unitcol(m)); → 0, 0, B, -A,2A, → 2C,-4C,-A,B, B, → 0, A, 0, 0, 0 |