リーマン面 じゃない
riimammenjanai
1. Not a Riemann surface.
Noun
#2158374
1. Not a Riemann surface.
1. not
1. then; well
1. within ...; inside ...
1. face
2. surface
3. mask (esp. a noh or kyogen mask)
1. cotton plant (Gossypium spp.)
2. batting; wadding