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math.la.c.mat.mult…
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Multiplication of block/partitioned matrices
math.la.c.mat.mult.block
For matrices, AB=AC does not imply B=C in general.
math.la.c.mat.mult.cancellation
Matrix multiplication is not commutative in general.
math.la.c.mat.mult.commut
For matrices, AB=0 does not imply A=0 or B=0 in general.
math.la.c.mat.mult.zero_divisor