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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq 4031 |
. . . . . . 7
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2 | 1 | notbid 668 |
. . . . . 6
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3 | 2 | ralbidv 2494 |
. . . . 5
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4 | breq 4031 |
. . . . . . 7
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5 | breq 4031 |
. . . . . . . 8
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6 | 5 | rexbidv 2495 |
. . . . . . 7
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7 | 4, 6 | imbi12d 234 |
. . . . . 6
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8 | 7 | ralbidv 2494 |
. . . . 5
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9 | 3, 8 | anbi12d 473 |
. . . 4
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10 | 9 | rabbidv 2749 |
. . 3
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11 | 10 | unieqd 3846 |
. 2
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12 | df-sup 7043 |
. 2
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13 | df-sup 7043 |
. 2
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14 | 11, 12, 13 | 3eqtr4g 2251 |
1
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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 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 |
This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-rab 2481 df-uni 3836 df-br 4030 df-sup 7043 |
This theorem is referenced by: infeq3 7074 |
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