正則 せいそく行列 ぎょうれつじゃありませんでした
hiseisokugyōretsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 非正則行列

1. It was not a regular matrix.; It wasn't a regular matrix.

Past/Perfective
Negative
Polite
Terminal Form
Mathematics