可付 かふ ばん集合 しゅうごうではありませんでした
kafubanshū gōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 可付番集合

1. Was not a payable number set.; Was not a settable number.

Past/Perfective
Negative
Polite
Formal Register
Mathematics