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Mirrors > Home > ILE Home > Th. List > rexsng | Unicode version |
Description: Restricted existential quantification over a singleton. (Contributed by NM, 29-Jan-2012.) |
Ref | Expression |
---|---|
ralsng.1 |
Ref | Expression |
---|---|
rexsng |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexsns 3600 | . 2 | |
2 | ralsng.1 | . . 3 | |
3 | 2 | sbcieg 2969 | . 2 |
4 | 1, 3 | syl5bb 191 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wceq 1335 wcel 2128 wrex 2436 wsbc 2937 csn 3561 |
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 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1338 df-nf 1441 df-sb 1743 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-rex 2441 df-v 2714 df-sbc 2938 df-sn 3567 |
This theorem is referenced by: rexsn 3605 rexprg 3613 rextpg 3615 iunxsng 3926 imasng 4953 |
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