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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 7232 is proven without the Axiom of Replacement ax-rep 5232, but depends on ax-un 7751, which is not required for the proof of fex 7232. (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 7764 | . . 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 6737 | . . 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 2145 Vcvv 3451 ⊆ wss 3899 × cxp 5649 ⟶wf 6534 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-pow 5327 ax-pr 5391 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-xp 5657 df-rel 5658 df-cnv 5659 df-dm 5661 df-rn 5662 df-fun 6540 df-fn 6541 df-f 6542 |
| This theorem is used by: elmapg 8859 f1oen2g 8995 f1dom2g 8996 dom3d 9021 domssex2 9156 domssex 9157 mapxpen 9162 oismo 9534 wdomima2g 9580 dfac8clem 10111 acni2 10125 acnlem 10127 dfac4 10201 dfac2a 10208 axdc2lem 10526 axdc4lem 10533 axcclem 10535 mpoaddex 13116 addex 13117 mpomulex 13118 mulex 13119 seqf1olem2 14185 seqf1o 14186 limsuple 15645 limsuplt 15646 limsupbnd1 15649 caucvgrlem 15840 prdsplusg 17629 prdsmulr 17630 prdsvsca 17631 prdshom 17638 gsumval 18866 frmdplusg 19050 isghm 19430 odinf 19777 staffval 21098 cnfldcj 21687 cnfldds 21690 xrsadd 21696 xrsmul 21697 xrsds 21716 ocvfval 21972 cnpfval 23552 iscnp2 23557 fmf 24264 tsmsval 24450 blfvalps 24702 nmfval 24907 tngnm 24970 tngngp2 24971 tngngpd 24972 tngngp 24973 nmoffn 25030 nmofval 25033 ishtpy 25293 tcphex 25538 elno 28003 adjeu 32491 ismeas 34832 isismty 38735 rrnval 38761 subex 43298 absex 43299 cjex 43300 sn-isghm 43684 |
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