直積 ちょくせき集合 しゅうごうではありませんでした
chokusekishūgōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 直積集合

1. Was not a direct product.; Was not a Cartesian product.

Past/Perfective
Negative
Polite
Formal Register
Mathematics