Description: Stronger version of djussxp . (Contributed by Thierry Arnoux, 23-Jun-2024)
Ref | Expression | ||
---|---|---|---|
Assertion | djussxp2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv | ||
2 | nfiu1 | ||
3 | 1 2 | nfxp | |
4 | 3 | iunssf | |
5 | snssi | ||
6 | ssiun2 | ||
7 | xpss12 | ||
8 | 5 6 7 | syl2anc | |
9 | 4 8 | mprgbir |