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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 4070 |
. . . . . . 7
|
| 5 | 4 | notbid 669 |
. . . . . 6
|
| 6 | 2, 5 | raleqbidv 2721 |
. . . . 5
|
| 7 | 3 | breqd 4070 |
. . . . . . 7
|
| 8 | 3 | breqd 4070 |
. . . . . . . 8
|
| 9 | 2, 8 | rexeqbidv 2722 |
. . . . . . 7
|
| 10 | 7, 9 | imbi12d 234 |
. . . . . 6
|
| 11 | 1, 10 | raleqbidv 2721 |
. . . . 5
|
| 12 | 6, 11 | anbi12d 473 |
. . . 4
|
| 13 | 1, 12 | rabeqbidv 2771 |
. . 3
|
| 14 | 13 | unieqd 3875 |
. 2
|
| 15 | df-sup 7112 |
. 2
| |
| 16 | df-sup 7112 |
. 2
| |
| 17 | 14, 15, 16 | 3eqtr4g 2265 |
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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2189 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-rab 2495 df-uni 3865 df-br 4060 df-sup 7112 |
| This theorem is referenced by: infeq123d 7144 |
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