An mxn matrix is one whose entries below the main diagonal's are zeros. When is a square upper triangular matrix invertible?

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- Oct 14th 2009, 06:58 PMcottekrupper triangular matrix
An mxn matrix is one whose entries below the main diagonal's are zeros. When is a square upper triangular matrix invertible?

- Oct 14th 2009, 09:34 PMtonio