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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 7170 is proven without the Axiom of Replacement ax-rep 5222, but depends on ax-un 7678, which is not required for the proof of fex 7170. (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 7693 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) | |
| 2 | 1 | 3adant1 1130 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| 3 | fssxp 6687 | . . 3 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 ⊆ (𝐴 × 𝐵)) | |
| 4 | 3 | 3ad2ant1 1133 | . 2 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝐹 ⊆ (𝐴 × 𝐵)) |
| 5 | 2, 4 | ssexd 5267 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 ∈ wcel 2113 Vcvv 3438 ⊆ wss 3899 × cxp 5620 ⟶wf 6486 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-xp 5628 df-rel 5629 df-cnv 5630 df-dm 5632 df-rn 5633 df-fun 6492 df-fn 6493 df-f 6494 |
| This theorem is referenced by: elmapg 8774 f1oen2g 8903 f1dom2g 8904 dom3d 8929 domssex2 9063 domssex 9064 mapxpen 9069 oismo 9443 wdomima2g 9489 dfac8clem 9940 acni2 9954 acnlem 9956 dfac4 10030 dfac2a 10038 axdc2lem 10356 axdc4lem 10363 axcclem 10365 mpoaddex 12899 addex 12900 mpomulex 12901 mulex 12902 seqf1olem2 13963 seqf1o 13964 limsuple 15399 limsuplt 15400 limsupbnd1 15403 caucvgrlem 15594 prdsplusg 17376 prdsmulr 17377 prdsvsca 17378 prdshom 17385 gsumval 18600 frmdplusg 18777 isghm 19142 odinf 19490 staffval 20772 cnfldcj 21316 cnfldds 21319 cnfldcjOLD 21329 cnflddsOLD 21332 xrsadd 21338 xrsmul 21339 xrsds 21362 ocvfval 21619 cnpfval 23176 iscnp2 23181 fmf 23887 tsmsval 24073 blfvalps 24325 nmfval 24530 tngnm 24593 tngngp2 24594 tngngpd 24595 tngngp 24596 nmoffn 24653 nmofval 24656 ishtpy 24925 tcphex 25171 elno 27611 adjeu 31913 ismeas 34305 isismty 37941 rrnval 37967 subex 42444 absex 42445 cjex 42446 sn-isghm 42858 |
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