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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 2775 |
. . . . . . . 8
| |
| 2 | 1 | a1i 9 |
. . . . . . 7
|
| 3 | simp3 1002 |
. . . . . . . 8
| |
| 4 | simp2 1001 |
. . . . . . . . 9
| |
| 5 | brcnvg 4859 |
. . . . . . . . 9
| |
| 6 | 1, 4, 5 | sylancr 414 |
. . . . . . . 8
|
| 7 | 3, 6 | mpbird 167 |
. . . . . . 7
|
| 8 | breq1 4047 |
. . . . . . . 8
| |
| 9 | 8 | elrab 2929 |
. . . . . . 7
|
| 10 | 2, 7, 9 | sylanbrc 417 |
. . . . . 6
|
| 11 | elssuni 3878 |
. . . . . 6
| |
| 12 | 10, 11 | syl 14 |
. . . . 5
|
| 13 | 12 | 3expia 1208 |
. . . 4
|
| 14 | 13 | alrimiv 1897 |
. . 3
|
| 15 | fvss 5590 |
. . 3
| |
| 16 | 14, 15 | syl 14 |
. 2
|
| 17 | seex 4382 |
. . 3
| |
| 18 | uniexg 4486 |
. . 3
| |
| 19 | 17, 18 | syl 14 |
. 2
|
| 20 | ssexg 4183 |
. 2
| |
| 21 | 16, 19, 20 | syl2anc 411 |
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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-13 2178 ax-14 2179 ax-ext 2187 ax-sep 4162 ax-pow 4218 ax-pr 4253 ax-un 4480 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-eu 2057 df-mo 2058 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rex 2490 df-rab 2493 df-v 2774 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-uni 3851 df-br 4045 df-opab 4106 df-se 4380 df-cnv 4683 df-iota 5232 df-fv 5279 |
| This theorem is referenced by: (None) |
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