- #1

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I have a rough idea what this is.. an upper triangular matrix, with the odd non-zero element(s), somewhere along it's sub-diagonal. But I need an actual formal definition. Anyone furnish me with one please?

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- Thread starter jezza10181
- Start date

- #1

- 13

- 1

I have a rough idea what this is.. an upper triangular matrix, with the odd non-zero element(s), somewhere along it's sub-diagonal. But I need an actual formal definition. Anyone furnish me with one please?

- #2

AlephZero

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I have a rough idea what this is.. an upper triangular matrix, with the odd non-zero element(s), somewhere along it's sub-diagonal. But I need an actual formal definition. Anyone furnish me with one please?

You probably mean "a block upper triangular matrix with either 1x1 or 2x2 blocks on the diagonal."

http://books.google.co.uk/books?id=...epage&q=quasi upper triangular matrix&f=false

http://reference.wolfram.com/legacy.../AdvancedDocumentationLinearAlgebra3.4.5.html

It should be clear exactly what G&VL mean from the context in the book.

- #3

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Thanks, the first link was very helpful

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