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Re^2: decomposing binary matrices

by hv (Parson)
on Feb 16, 2007 at 14:16 UTC ( #600437=note: print w/ replies, xml ) Need Help??


in reply to Re: decomposing binary matrices
in thread decomposing binary matrices

I don't think that is sufficient: a submatrix need not have all ones, as for example in the 3x3 submatrix of the example. Indeed, a 3x3 submatrix could have bit-patterns 110, 101, 011 such that no two rows or column are the same, nor is any row or column all ones.

Hugo


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