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Mirrors > Home > ILE Home > Th. List > supeq3 | Unicode version |
Description: Equality theorem for supremum. (Contributed by Scott Fenton, 13-Jun-2018.) |
Ref | Expression |
---|---|
supeq3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq 3984 | . . . . . . 7 | |
2 | 1 | notbid 657 | . . . . . 6 |
3 | 2 | ralbidv 2466 | . . . . 5 |
4 | breq 3984 | . . . . . . 7 | |
5 | breq 3984 | . . . . . . . 8 | |
6 | 5 | rexbidv 2467 | . . . . . . 7 |
7 | 4, 6 | imbi12d 233 | . . . . . 6 |
8 | 7 | ralbidv 2466 | . . . . 5 |
9 | 3, 8 | anbi12d 465 | . . . 4 |
10 | 9 | rabbidv 2715 | . . 3 |
11 | 10 | unieqd 3800 | . 2 |
12 | df-sup 6949 | . 2 | |
13 | df-sup 6949 | . 2 | |
14 | 11, 12, 13 | 3eqtr4g 2224 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wceq 1343 wral 2444 wrex 2445 crab 2448 cuni 3789 class class class wbr 3982 csup 6947 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-ext 2147 |
This theorem depends on definitions: df-bi 116 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-rab 2453 df-uni 3790 df-br 3983 df-sup 6949 |
This theorem is referenced by: infeq3 6980 |
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