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| Mirrors > Home > ILE Home > Th. List > fexd | Unicode version | ||
| Description: If the domain of a mapping is a set, the function is a set. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
| Ref | Expression |
|---|---|
| fexd.1 |
|
| fexd.2 |
|
| Ref | Expression |
|---|---|
| fexd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fexd.1 |
. 2
| |
| 2 | fexd.2 |
. 2
| |
| 3 | fex 5893 |
. 2
| |
| 4 | 1, 2, 3 | 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-reu 2518 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 |
| This theorem is referenced by: suppsnopdc 6428 suppssrst 6439 seqf1oglem2a 10843 seqf1oglem2 10845 seqf1og 10846 iswrd 11181 imasival 13469 imasbas 13470 imasplusg 13471 imasmulr 13472 imasaddfnlemg 13477 imasaddvallemg 13478 igsumval 13553 gsumsplit1r 13561 gsumprval 13562 prdssgrpd 13578 gsumfzcl 13662 isghm 13910 gsumfzreidx 14004 gsumfzsubmcl 14005 gsumfzmptfidmadd 14006 gsumfzmhm 14010 iswlkg 16270 depindlem1 16447 depindlem2 16448 gfsumval 16809 gsumgfsumlem 16812 |
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