Metamath Proof Explorer


Theorem cnrnvc

Description: The module of complex numbers (as a module over itself) is a normed vector space over itself. The vector operation is + , and the scalar product is x. , and the norm function is abs . (Contributed by AV, 9-Oct-2021)

Ref Expression
Hypothesis cnrnvc.c
|- C = ( ringLMod ` CCfld )
Assertion cnrnvc
|- C e. NrmVec

Proof

Step Hyp Ref Expression
1 cnrnvc.c
 |-  C = ( ringLMod ` CCfld )
2 cnnrg
 |-  CCfld e. NrmRing
3 cndrng
 |-  CCfld e. DivRing
4 rlmnvc
 |-  ( ( CCfld e. NrmRing /\ CCfld e. DivRing ) -> ( ringLMod ` CCfld ) e. NrmVec )
5 1 4 eqeltrid
 |-  ( ( CCfld e. NrmRing /\ CCfld e. DivRing ) -> C e. NrmVec )
6 2 3 5 mp2an
 |-  C e. NrmVec