411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0g4
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Identity matrix:
The identity matrix of size n is the n x n square matrix with ones on the main diagonal and zeros elsewhere.... W: Identity matrix
Elementary rows operations with the identity matrix:
c00a.c ... Swap two rows
c00b.c ... Zero under the pivot "C1"
c00c.c ... Zero under the pivot "C2"
c00d.c ... The pivot at one
c00e.c ... Put zero above the pivot
Elementary columns operations with the identity matrix:
c00a.c ... Swap two columns
c00b.c ... Zero on the right of the pivot"
c00c.c ... The pivot at one:"
c00d.c ... Put zero on the left of the pivot