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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 4035 | 
. . . . . . 7
 | |
| 2 | 1 | notbid 668 | 
. . . . . 6
 | 
| 3 | 2 | ralbidv 2497 | 
. . . . 5
 | 
| 4 | breq 4035 | 
. . . . . . 7
 | |
| 5 | breq 4035 | 
. . . . . . . 8
 | |
| 6 | 5 | rexbidv 2498 | 
. . . . . . 7
 | 
| 7 | 4, 6 | imbi12d 234 | 
. . . . . 6
 | 
| 8 | 7 | ralbidv 2497 | 
. . . . 5
 | 
| 9 | 3, 8 | anbi12d 473 | 
. . . 4
 | 
| 10 | 9 | rabbidv 2752 | 
. . 3
 | 
| 11 | 10 | unieqd 3850 | 
. 2
 | 
| 12 | df-sup 7050 | 
. 2
 | |
| 13 | df-sup 7050 | 
. 2
 | |
| 14 | 11, 12, 13 | 3eqtr4g 2254 | 
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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 | 
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rab 2484 df-uni 3840 df-br 4034 df-sup 7050 | 
| This theorem is referenced by: infeq3 7081 | 
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