Metamath Proof Explorer


Theorem 1div1e1

Description: 1 divided by 1 is 1. (Contributed by David A. Wheeler, 7-Dec-2018)

Ref Expression
Assertion 1div1e1 11=1

Proof

Step Hyp Ref Expression
1 ax-1cn 1
2 div1 111=1
3 1 2 ax-mp 11=1