At: incl aux3 quo 1 2 1 1
1. n: {1...}
2. m:
n
3. E:
n

n
Prop
4. EquivRel i,j:
n. i E j
5. EquivRel i,j:
m. i E j
6. x: i,j:
m//(i E j)
7. y: i,j:
m//(i E j)
x
i,j:
n//(i E j)
By: BackThru
Thm*
n:{1...}, m:
n, E:(
n

n
Prop).
(EquivRel x,y:
n. x E y) 
(
z:x,y:
m//(x E y). z
x,y:
n//(x E y))
Generated subgoals:None
About: