In a peice of coursework I need to work out some stuff about [itex]UT \left( n, \mathbb{R} \right)[/itex].(adsbygoogle = window.adsbygoogle || []).push({});

I forget what the definition of this, is it: given [itex]M \in UT \left( n, \mathbb{R} \right)[/itex] and represented by [itex]M = \left(a_{i, j} \right)[/itex] Where [itex]a_{i, j}[/itex] is a typical element of M then if i > j [itex]a_{i, j} = 0[/itex] else [itex]a_{i, j} \in \mathbb{R}[/itex].

Or was there the added condition that if i = j then [itex]a_{i, j} = 1[/itex]?

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# Quick question on a group definition

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