宣言 せんげん部分 ぶぶん集合 しゅうごうではありませんでした
sengembubunshūgōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 宣言部分集合

1. Was not a declared subset.; Was not a designated subset.

Past/Perfective
Negative
Polite
Formal Register
Computing