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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 2605 |
. . . . . . . 8
![]() ![]() ![]() ![]() | |
2 | 1 | a1i 9 |
. . . . . . 7
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3 | simp3 941 |
. . . . . . . 8
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4 | simp2 940 |
. . . . . . . . 9
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
5 | brcnvg 4544 |
. . . . . . . . 9
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
6 | 1, 4, 5 | sylancr 405 |
. . . . . . . 8
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7 | 3, 6 | mpbird 165 |
. . . . . . 7
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8 | breq1 3796 |
. . . . . . . 8
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9 | 8 | elrab 2750 |
. . . . . . 7
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10 | 2, 7, 9 | sylanbrc 408 |
. . . . . 6
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11 | elssuni 3637 |
. . . . . 6
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12 | 10, 11 | syl 14 |
. . . . 5
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13 | 12 | 3expia 1141 |
. . . 4
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14 | 13 | alrimiv 1796 |
. . 3
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15 | fvss 5220 |
. . 3
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16 | 14, 15 | syl 14 |
. 2
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17 | seex 4098 |
. . 3
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18 | uniexg 4201 |
. . 3
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19 | 17, 18 | syl 14 |
. 2
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20 | ssexg 3925 |
. 2
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
21 | 16, 19, 20 | syl2anc 403 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-13 1445 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3904 ax-pow 3956 ax-pr 3972 ax-un 4196 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-eu 1945 df-mo 1946 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-rab 2358 df-v 2604 df-un 2978 df-in 2980 df-ss 2987 df-pw 3392 df-sn 3412 df-pr 3413 df-op 3415 df-uni 3610 df-br 3794 df-opab 3848 df-se 4096 df-cnv 4379 df-iota 4897 df-fv 4940 |
This theorem is referenced by: (None) |
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