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Mirrors > Home > ILE Home > Th. List > reusv3i | Unicode version |
Description: Two ways of expressing existential uniqueness via an indirect equality. (Contributed by NM, 23-Dec-2012.) |
Ref | Expression |
---|---|
reusv3.1 | |
reusv3.2 |
Ref | Expression |
---|---|
reusv3i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reusv3.1 | . . . . . 6 | |
2 | reusv3.2 | . . . . . . 7 | |
3 | 2 | eqeq2d 2092 | . . . . . 6 |
4 | 1, 3 | imbi12d 232 | . . . . 5 |
5 | 4 | cbvralv 2577 | . . . 4 |
6 | 5 | biimpi 118 | . . 3 |
7 | raaanv 3348 | . . . 4 | |
8 | prth 336 | . . . . . . 7 | |
9 | eqtr2 2099 | . . . . . . 7 | |
10 | 8, 9 | syl6 33 | . . . . . 6 |
11 | 10 | ralimi 2426 | . . . . 5 |
12 | 11 | ralimi 2426 | . . . 4 |
13 | 7, 12 | sylbir 133 | . . 3 |
14 | 6, 13 | mpdan 412 | . 2 |
15 | 14 | rexlimivw 2473 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 102 wb 103 wceq 1284 wral 2348 wrex 2349 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 |
This theorem is referenced by: reusv3 4210 |
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