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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 5915 | . 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 2203 Vcvv 2813 ⟶wf 5348 |
| 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 2206 ax-ext 2214 ax-coll 4225 ax-sep 4228 ax-pow 4287 ax-pr 4322 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2815 df-sbc 3043 df-csb 3139 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-iun 3993 df-br 4110 df-opab 4172 df-mpt 4173 df-id 4414 df-xp 4755 df-rel 4756 df-cnv 4757 df-co 4758 df-dm 4759 df-rn 4760 df-res 4761 df-ima 4762 df-iota 5312 df-fun 5354 df-fn 5355 df-f 5356 df-f1 5357 df-fo 5358 df-f1o 5359 df-fv 5360 |
| This theorem is referenced by: suppsnopdc 6450 suppssrst 6461 seqf1oglem2a 10880 seqf1oglem2 10882 seqf1og 10883 iswrd 11226 imasival 13519 imasbas 13520 imasplusg 13521 imasmulr 13522 imasaddfnlemg 13527 imasaddvallemg 13528 igsumval 13603 gsumsplit1r 13611 gsumprval 13612 prdssgrpd 13628 gsumfzcl 13712 isghm 13960 gsumfzreidx 14054 gsumfzsubmcl 14055 gsumfzmptfidmadd 14056 gsumfzmhm 14060 iswlkg 16324 depindlem1 16501 depindlem2 16502 gfsumval 16862 gsumgfsumlem 16865 |
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