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Is there a standard notation for the algebra/ring of upper triangular matrices?--[[Special:Contributions/129.70.14.128|129.70.14.128]] ([[User talk:129.70.14.128|talk]]) 23:09, 16 December 2007 (UTC)
== Quasi-triangular matrices ==
In MATLAB and related programs I have seen references to 'quasi-upper-triangular' matrices, but I can't find a definition. Would someone please add a definition here? --[[User:Rinconsoleao|Rinconsoleao]] ([[User talk:Rinconsoleao|talk]]) 22:12, 28 February 2008 (UTC)
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