Description: Equality for alternate ordered pairs. (Contributed by Scott Fenton, 22-Mar-2012)
Ref | Expression | ||
---|---|---|---|
Assertion | altopeq12 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sneq | |
|
2 | sneq | |
|
3 | 1 2 | anim12i | |
4 | altopthsn | |
|
5 | 3 4 | sylibr | |