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]?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Quick question on a group definition

**Physics Forums | Science Articles, Homework Help, Discussion**