two problems that I have problem with:

1. let A be orthogonal matrix that is triangular, prove that A is diagonal.

2.let be true, does and if it is why???

Thanks ahead

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- Feb 6th 2009, 12:30 AMomertorthogonal matrix
two problems that I have problem with:

1. let A be orthogonal matrix that is triangular, prove that A is diagonal.

2.let be true, does and if it is why???

Thanks ahead - Feb 6th 2009, 08:28 AMThePerfectHacker