At: comp choice 1 1 1 1 1 1 1 2
1. E: 




Prop
2.
x,y:
. Dec(x E y)
3. r: 






4.
x,y:
. (x r y) 
(x E y)
5. EquivRel x,y:
. x r y
n:
. n r Min{ x | xrn }
By:
Analyze 0
THEN
BackThru
Thm*
E:(





), n:
. (EquivRel x,y:
. x E y) 
(n E Min{ x | xEn })
Generated subgoals:None
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