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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 5838 |
. 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-14 2181 ax-ext 2189 ax-coll 4176 ax-sep 4179 ax-pow 4235 ax-pr 4270 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-reu 2493 df-rab 2495 df-v 2779 df-sbc 3007 df-csb 3103 df-un 3179 df-in 3181 df-ss 3188 df-pw 3629 df-sn 3650 df-pr 3651 df-op 3653 df-uni 3866 df-iun 3944 df-br 4061 df-opab 4123 df-mpt 4124 df-id 4359 df-xp 4700 df-rel 4701 df-cnv 4702 df-co 4703 df-dm 4704 df-rn 4705 df-res 4706 df-ima 4707 df-iota 5252 df-fun 5293 df-fn 5294 df-f 5295 df-f1 5296 df-fo 5297 df-f1o 5298 df-fv 5299 |
| This theorem is referenced by: seqf1oglem2a 10702 seqf1oglem2 10704 seqf1og 10705 iswrd 11035 imasival 13299 imasbas 13300 imasplusg 13301 imasmulr 13302 imasaddfnlemg 13307 imasaddvallemg 13308 igsumval 13383 gsumsplit1r 13391 gsumprval 13392 prdssgrpd 13408 gsumfzcl 13492 isghm 13740 gsumfzreidx 13834 gsumfzsubmcl 13835 gsumfzmptfidmadd 13836 gsumfzmhm 13840 |
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