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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 5883 |
. 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 |
| This theorem is referenced by: seqf1oglem2a 10781 seqf1oglem2 10783 seqf1og 10784 iswrd 11119 imasival 13407 imasbas 13408 imasplusg 13409 imasmulr 13410 imasaddfnlemg 13415 imasaddvallemg 13416 igsumval 13491 gsumsplit1r 13499 gsumprval 13500 prdssgrpd 13516 gsumfzcl 13600 isghm 13848 gsumfzreidx 13942 gsumfzsubmcl 13943 gsumfzmptfidmadd 13944 gsumfzmhm 13948 iswlkg 16199 depindlem1 16376 depindlem2 16377 gfsumval 16732 gsumgfsumlem 16735 |
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