Common use of Lemma Clause in Contracts

Lemma. For n > 0 we have a canonical isomorphism of GR-modules (2πi)n µm( ) = m (2πi)n Z.

Lemma. For n > < 0 we have a canonical isomorphism of GR-modules ⊗n : ⊗(−n) , /m ∼ (2πi)n Z . µm( ) = (µm ( ) Z Z) = m (2πi)n Z.Z Z Z = (