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Mirrors > Home > ILE Home > Th. List > ceqsrexv | Unicode version |
Description: Elimination of a restricted existential quantifier, using implicit substitution. (Contributed by NM, 30-Apr-2004.) |
Ref | Expression |
---|---|
ceqsrexv.1 |
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Ref | Expression |
---|---|
ceqsrexv |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rex 2423 |
. . 3
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2 | an12 551 |
. . . 4
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3 | 2 | exbii 1585 |
. . 3
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4 | 1, 3 | bitr4i 186 |
. 2
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5 | eleq1 2203 |
. . . . 5
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6 | ceqsrexv.1 |
. . . . 5
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7 | 5, 6 | anbi12d 465 |
. . . 4
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8 | 7 | ceqsexgv 2818 |
. . 3
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9 | 8 | bianabs 601 |
. 2
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10 | 4, 9 | syl5bb 191 |
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 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-rex 2423 df-v 2691 |
This theorem is referenced by: ceqsrexbv 2820 ceqsrex2v 2821 f1oiso 5735 creur 8741 creui 8742 |
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