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| Mirrors > Home > ILE Home > Th. List > supeq123d | Unicode version | ||
| Description: Equality deduction for supremum. (Contributed by Stefan O'Rear, 20-Jan-2015.) |
| Ref | Expression |
|---|---|
| supeq123d.a |
|
| supeq123d.b |
|
| supeq123d.c |
|
| Ref | Expression |
|---|---|
| supeq123d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | supeq123d.b |
. . . 4
| |
| 2 | supeq123d.a |
. . . . . 6
| |
| 3 | supeq123d.c |
. . . . . . . 8
| |
| 4 | 3 | breqd 4054 |
. . . . . . 7
|
| 5 | 4 | notbid 668 |
. . . . . 6
|
| 6 | 2, 5 | raleqbidv 2717 |
. . . . 5
|
| 7 | 3 | breqd 4054 |
. . . . . . 7
|
| 8 | 3 | breqd 4054 |
. . . . . . . 8
|
| 9 | 2, 8 | rexeqbidv 2718 |
. . . . . . 7
|
| 10 | 7, 9 | imbi12d 234 |
. . . . . 6
|
| 11 | 1, 10 | raleqbidv 2717 |
. . . . 5
|
| 12 | 6, 11 | anbi12d 473 |
. . . 4
|
| 13 | 1, 12 | rabeqbidv 2766 |
. . 3
|
| 14 | 13 | unieqd 3860 |
. 2
|
| 15 | df-sup 7085 |
. 2
| |
| 16 | df-sup 7085 |
. 2
| |
| 17 | 14, 15, 16 | 3eqtr4g 2262 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1469 ax-7 1470 ax-gen 1471 ax-ie1 1515 ax-ie2 1516 ax-8 1526 ax-10 1527 ax-11 1528 ax-i12 1529 ax-bndl 1531 ax-4 1532 ax-17 1548 ax-i9 1552 ax-ial 1556 ax-i5r 1557 ax-ext 2186 |
| This theorem depends on definitions: df-bi 117 df-tru 1375 df-nf 1483 df-sb 1785 df-clab 2191 df-cleq 2197 df-clel 2200 df-nfc 2336 df-ral 2488 df-rex 2489 df-rab 2492 df-uni 3850 df-br 4044 df-sup 7085 |
| This theorem is referenced by: infeq123d 7117 |
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