[eigen] Re: LU partial pivoting: LUP versus PLU

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2009/1/28 Benoit Jacob <jacob.benoit.1@xxxxxxxxx>:
> my U matrix must have all the nonzero diagonal coefficients grouped at
> the beginning.

Let me rephrase that: my matrix U must have all the "leading
coefficients" lying on the main diagonal.

Here I call "leading coefficient" any coefficient that is the first
nonzero coefficient in its own row (going from left to right).


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