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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 7231 is proven without the Axiom of Replacement ax-rep 5240, but depends on ax-un 7742, which is not required for the proof of fex 7231. (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 7755 | . . 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 5297 | 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 2146 Vcvv 3457 ⊆ wss 3906 × cxp 5661 ⟶wf 6536 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pow 5338 ax-pr 5406 ax-un 7742 |
| 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 2744 df-cleq 2757 df-clel 2840 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-xp 5669 df-rel 5670 df-cnv 5671 df-dm 5673 df-rn 5674 df-fun 6542 df-fn 6543 df-f 6544 |
| This theorem is used by: elmapg 8842 f1oen2g 8971 f1dom2g 8972 dom3d 8997 domssex2 9132 domssex 9133 mapxpen 9138 oismo 9509 wdomima2g 9555 dfac8clem 10032 acni2 10046 acnlem 10048 dfac4 10122 dfac2a 10129 axdc2lem 10447 axdc4lem 10454 axcclem 10456 mpoaddex 13028 addex 13029 mpomulex 13030 mulex 13031 seqf1olem2 14096 seqf1o 14097 limsuple 15553 limsuplt 15554 limsupbnd1 15557 caucvgrlem 15748 prdsplusg 17533 prdsmulr 17534 prdsvsca 17535 prdshom 17542 gsumval 18767 frmdplusg 18950 isghm 19330 odinf 19677 staffval 20994 cnfldcj 21581 cnfldds 21584 xrsadd 21590 xrsmul 21591 xrsds 21610 ocvfval 21866 cnpfval 23441 iscnp2 23446 fmf 24153 tsmsval 24339 blfvalps 24591 nmfval 24796 tngnm 24859 tngngp2 24860 tngngpd 24861 tngngp 24862 nmoffn 24919 nmofval 24922 ishtpy 25182 tcphex 25427 elno 27861 adjeu 32312 ismeas 34654 isismty 38510 rrnval 38536 subex 43073 absex 43074 cjex 43075 sn-isghm 43463 |
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