Metamath Proof Explorer

Theorem 2thalfe1

Description: 2 times one half equals 1. (Contributed by Umit Teoman Dogan, 10-Jun-2026)

Ref Expression
Assertion 2thalfe1 
|- ( 2 x. ( 1 / 2 ) ) = 1

Proof

Step Hyp Ref Expression
1 2cn 
 |-  2 e. CC
2 2ne0 
 |-  2 =/= 0
3 1 2 recidi 
 |-  ( 2 x. ( 1 / 2 ) ) = 1