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| Mirrors > Home > ILE Home > Th. List > fexd | GIF 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 | ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) |
| fexd.2 | ⊢ (𝜑 → 𝐴 ∈ 𝐶) |
| Ref | Expression |
|---|---|
| fexd | ⊢ (𝜑 → 𝐹 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fexd.1 | . 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵) | |
| 2 | fexd.2 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐶) | |
| 3 | fex 5878 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → 𝐹 ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 Vcvv 2800 ⟶wf 5320 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-coll 4202 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-iun 3970 df-br 4087 df-opab 4149 df-mpt 4150 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-f1 5329 df-fo 5330 df-f1o 5331 df-fv 5332 |
| This theorem is referenced by: seqf1oglem2a 10770 seqf1oglem2 10772 seqf1og 10773 iswrd 11105 imasival 13379 imasbas 13380 imasplusg 13381 imasmulr 13382 imasaddfnlemg 13387 imasaddvallemg 13388 igsumval 13463 gsumsplit1r 13471 gsumprval 13472 prdssgrpd 13488 gsumfzcl 13572 isghm 13820 gsumfzreidx 13914 gsumfzsubmcl 13915 gsumfzmptfidmadd 13916 gsumfzmhm 13920 iswlkg 16126 |
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