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| Mirrors > Home > MPE Home > Th. List > fex2 | Structured version Visualization version GIF version | ||
| Description: A function with bounded domain and codomain is a set. This version of fex 7236 is proven without the Axiom of Replacement ax-rep 5231, but depends on ax-un 7755, which is not required for the proof of fex 7236. (Contributed by Mario Carneiro, 24-Jun-2015.) |
| Ref | Expression |
|---|---|
| fex2 | ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝐹 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpexg 7768 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) | |
| 2 | 1 | 3adant1 1148 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| 3 | fssxp 6742 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 ⊆ (𝐴 × 𝐵)) | |
| 4 | 3 | 3ad2ant1 1151 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝐹 ⊆ (𝐴 × 𝐵)) |
| 5 | 2, 4 | ssexd 5286 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 ∈ wcel 2144 Vcvv 3450 ⊆ wss 3896 × cxp 5649 ⟶wf 6539 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-xp 5657 df-rel 5658 df-cnv 5659 df-dm 5661 df-rn 5662 df-fun 6545 df-fn 6546 df-f 6547 |
| This theorem is used by: elmapg 8867 f1oen2g 9003 f1dom2g 9004 dom3d 9029 domssex2 9164 domssex 9165 mapxpen 9170 oismo 9541 wdomima2g 9587 dfac8clem 10118 acni2 10132 acnlem 10134 dfac4 10208 dfac2a 10215 axdc2lem 10533 axdc4lem 10540 axcclem 10542 mpoaddex 13123 addex 13124 mpomulex 13125 mulex 13126 seqf1olem2 14192 seqf1o 14193 limsuple 15654 limsuplt 15655 limsupbnd1 15658 caucvgrlem 15849 prdsplusg 17638 prdsmulr 17639 prdsvsca 17640 prdshom 17647 gsumval 18875 frmdplusg 19059 isghm 19439 odinf 19786 staffval 21107 cnfldcj 21696 cnfldds 21699 xrsadd 21705 xrsmul 21706 xrsds 21725 ocvfval 21981 cnpfval 23561 iscnp2 23566 fmf 24273 tsmsval 24459 blfvalps 24711 nmfval 24916 tngnm 24979 tngngp2 24980 tngngpd 24981 tngngp 24982 nmoffn 25039 nmofval 25042 ishtpy 25302 tcphex 25547 elno 28012 adjeu 32500 ismeas 34882 isismty 38872 rrnval 38898 subex 43435 absex 43436 cjex 43437 sn-isghm 43821 |
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