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| Mirrors > Home > ILE Home > Th. List > sefvex | Unicode version | ||
| Description: If a function is set-like, then the function value exists if the input does. (Contributed by Mario Carneiro, 24-May-2019.) |
| Ref | Expression |
|---|---|
| sefvex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2824 |
. . . . . . . 8
| |
| 2 | 1 | a1i 9 |
. . . . . . 7
|
| 3 | simp3 1030 |
. . . . . . . 8
| |
| 4 | simp2 1029 |
. . . . . . . . 9
| |
| 5 | brcnvg 4956 |
. . . . . . . . 9
| |
| 6 | 1, 4, 5 | sylancr 418 |
. . . . . . . 8
|
| 7 | 3, 6 | mpbird 167 |
. . . . . . 7
|
| 8 | breq1 4128 |
. . . . . . . 8
| |
| 9 | 8 | elrab 2982 |
. . . . . . 7
|
| 10 | 2, 7, 9 | sylanbrc 421 |
. . . . . 6
|
| 11 | elssuni 3958 |
. . . . . 6
| |
| 12 | 10, 11 | syl 14 |
. . . . 5
|
| 13 | 12 | 3expia 1236 |
. . . 4
|
| 14 | 13 | alrimiv 1927 |
. . 3
|
| 15 | fvss 5704 |
. . 3
| |
| 16 | 14, 15 | syl 14 |
. 2
|
| 17 | seex 4475 |
. . 3
| |
| 18 | uniexg 4580 |
. . 3
| |
| 19 | 17, 18 | syl 14 |
. 2
|
| 20 | ssexg 4267 |
. 2
| |
| 21 | 16, 19, 20 | syl2anc 415 |
1
|
| 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-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-br 4126 df-opab 4188 df-se 4473 df-cnv 4777 df-iota 5332 df-fv 5380 |
| This theorem is referenced by: (None) |
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