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Mirrors > Home > ILE Home > Th. List > seex | Unicode version |
Description: The -preimage of an element of the base set in a set-like relation is a set. (Contributed by Mario Carneiro, 19-Nov-2014.) |
Ref | Expression |
---|---|
seex | Se |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-se 4250 | . 2 Se | |
2 | breq2 3928 | . . . . 5 | |
3 | 2 | rabbidv 2670 | . . . 4 |
4 | 3 | eleq1d 2206 | . . 3 |
5 | 4 | rspccva 2783 | . 2 |
6 | 1, 5 | sylanb 282 | 1 Se |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1331 wcel 1480 wral 2414 crab 2418 cvv 2681 class class class wbr 3924 Se wse 4246 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rab 2423 df-v 2683 df-un 3070 df-sn 3528 df-pr 3529 df-op 3531 df-br 3925 df-se 4250 |
This theorem is referenced by: sefvex 5435 |
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