Description: Lemma for frmx and frmy . (Contributed by Stefan O'Rear, 22-Sep-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | rmxyelxp | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rmxypairf1o | |
|
2 | 1 | adantr | |
3 | rmxyelqirr | |
|
4 | f1ocnvdm | |
|
5 | 2 3 4 | syl2anc | |