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Mirrors > Home > ILE Home > Th. List > fiss | GIF version |
Description: Subset relationship for function fi. (Contributed by Jeff Hankins, 7-Oct-2009.) (Revised by Mario Carneiro, 24-Nov-2013.) |
Ref | Expression |
---|---|
fiss | ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (fi‘𝐴) ⊆ (fi‘𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 109 | . . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → 𝐴 ⊆ 𝐵) | |
2 | sspwb 4188 | . . . . 5 ⊢ (𝐴 ⊆ 𝐵 ↔ 𝒫 𝐴 ⊆ 𝒫 𝐵) | |
3 | ssrin 3342 | . . . . 5 ⊢ (𝒫 𝐴 ⊆ 𝒫 𝐵 → (𝒫 𝐴 ∩ Fin) ⊆ (𝒫 𝐵 ∩ Fin)) | |
4 | 2, 3 | sylbi 120 | . . . 4 ⊢ (𝐴 ⊆ 𝐵 → (𝒫 𝐴 ∩ Fin) ⊆ (𝒫 𝐵 ∩ Fin)) |
5 | ssrexv 3202 | . . . 4 ⊢ ((𝒫 𝐴 ∩ Fin) ⊆ (𝒫 𝐵 ∩ Fin) → (∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑟 = ∩ 𝑥 → ∃𝑥 ∈ (𝒫 𝐵 ∩ Fin)𝑟 = ∩ 𝑥)) | |
6 | 1, 4, 5 | 3syl 17 | . . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑟 = ∩ 𝑥 → ∃𝑥 ∈ (𝒫 𝐵 ∩ Fin)𝑟 = ∩ 𝑥)) |
7 | vex 2724 | . . . 4 ⊢ 𝑟 ∈ V | |
8 | simpl 108 | . . . . 5 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → 𝐵 ∈ 𝑉) | |
9 | 8, 1 | ssexd 4116 | . . . 4 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → 𝐴 ∈ V) |
10 | elfi 6927 | . . . 4 ⊢ ((𝑟 ∈ V ∧ 𝐴 ∈ V) → (𝑟 ∈ (fi‘𝐴) ↔ ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑟 = ∩ 𝑥)) | |
11 | 7, 9, 10 | sylancr 411 | . . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (𝑟 ∈ (fi‘𝐴) ↔ ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑟 = ∩ 𝑥)) |
12 | elfi 6927 | . . . . 5 ⊢ ((𝑟 ∈ V ∧ 𝐵 ∈ 𝑉) → (𝑟 ∈ (fi‘𝐵) ↔ ∃𝑥 ∈ (𝒫 𝐵 ∩ Fin)𝑟 = ∩ 𝑥)) | |
13 | 7, 12 | mpan 421 | . . . 4 ⊢ (𝐵 ∈ 𝑉 → (𝑟 ∈ (fi‘𝐵) ↔ ∃𝑥 ∈ (𝒫 𝐵 ∩ Fin)𝑟 = ∩ 𝑥)) |
14 | 13 | adantr 274 | . . 3 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (𝑟 ∈ (fi‘𝐵) ↔ ∃𝑥 ∈ (𝒫 𝐵 ∩ Fin)𝑟 = ∩ 𝑥)) |
15 | 6, 11, 14 | 3imtr4d 202 | . 2 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (𝑟 ∈ (fi‘𝐴) → 𝑟 ∈ (fi‘𝐵))) |
16 | 15 | ssrdv 3143 | 1 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐴 ⊆ 𝐵) → (fi‘𝐴) ⊆ (fi‘𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1342 ∈ wcel 2135 ∃wrex 2443 Vcvv 2721 ∩ cin 3110 ⊆ wss 3111 𝒫 cpw 3553 ∩ cint 3818 ‘cfv 5182 Fincfn 6697 ficfi 6924 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-nul 4102 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-iinf 4559 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-ral 2447 df-rex 2448 df-v 2723 df-sbc 2947 df-csb 3041 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-nul 3405 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-uni 3784 df-int 3819 df-br 3977 df-opab 4038 df-mpt 4039 df-id 4265 df-suc 4343 df-iom 4562 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-res 4610 df-ima 4611 df-iota 5147 df-fun 5184 df-fn 5185 df-f 5186 df-f1 5187 df-fo 5188 df-f1o 5189 df-fv 5190 df-er 6492 df-en 6698 df-fin 6700 df-fi 6925 |
This theorem is referenced by: (None) |
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