Metamath Proof Explorer

Theorem 2t1e2

Description: 2 times 1 equals 2. (Contributed by David A. Wheeler, 6-Dec-2018)

Ref Expression
Assertion 2t1e2 
|- ( 2 x. 1 ) = 2

Proof

Step Hyp Ref Expression
1 2cn 
 |-  2 e. CC
2 1 mulid1i 
 |-  ( 2 x. 1 ) = 2