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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- October 14th 2009, 05:58 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?

- October 14th 2009, 08:34 PMtonio