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Mirrors > Home > MPE Home > Th. List > fsuppcolem | Structured version Visualization version GIF version |
Description: Lemma for fsuppco 8899. Formula building theorem for finite supports: rearranging the index set. (Contributed by Stefan O'Rear, 21-Mar-2015.) |
Ref | Expression |
---|---|
fsuppcolem.f | ⊢ (𝜑 → (◡𝐹 “ (V ∖ {𝑍})) ∈ Fin) |
fsuppcolem.g | ⊢ (𝜑 → 𝐺:𝑋–1-1→𝑌) |
Ref | Expression |
---|---|
fsuppcolem | ⊢ (𝜑 → (◡(𝐹 ∘ 𝐺) “ (V ∖ {𝑍})) ∈ Fin) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnvco 5725 | . . . 4 ⊢ ◡(𝐹 ∘ 𝐺) = (◡𝐺 ∘ ◡𝐹) | |
2 | 1 | imaeq1i 5898 | . . 3 ⊢ (◡(𝐹 ∘ 𝐺) “ (V ∖ {𝑍})) = ((◡𝐺 ∘ ◡𝐹) “ (V ∖ {𝑍})) |
3 | imaco 6081 | . . 3 ⊢ ((◡𝐺 ∘ ◡𝐹) “ (V ∖ {𝑍})) = (◡𝐺 “ (◡𝐹 “ (V ∖ {𝑍}))) | |
4 | 2, 3 | eqtri 2781 | . 2 ⊢ (◡(𝐹 ∘ 𝐺) “ (V ∖ {𝑍})) = (◡𝐺 “ (◡𝐹 “ (V ∖ {𝑍}))) |
5 | fsuppcolem.g | . . . 4 ⊢ (𝜑 → 𝐺:𝑋–1-1→𝑌) | |
6 | df-f1 6340 | . . . . 5 ⊢ (𝐺:𝑋–1-1→𝑌 ↔ (𝐺:𝑋⟶𝑌 ∧ Fun ◡𝐺)) | |
7 | 6 | simprbi 500 | . . . 4 ⊢ (𝐺:𝑋–1-1→𝑌 → Fun ◡𝐺) |
8 | 5, 7 | syl 17 | . . 3 ⊢ (𝜑 → Fun ◡𝐺) |
9 | fsuppcolem.f | . . 3 ⊢ (𝜑 → (◡𝐹 “ (V ∖ {𝑍})) ∈ Fin) | |
10 | imafi 8743 | . . 3 ⊢ ((Fun ◡𝐺 ∧ (◡𝐹 “ (V ∖ {𝑍})) ∈ Fin) → (◡𝐺 “ (◡𝐹 “ (V ∖ {𝑍}))) ∈ Fin) | |
11 | 8, 9, 10 | syl2anc 587 | . 2 ⊢ (𝜑 → (◡𝐺 “ (◡𝐹 “ (V ∖ {𝑍}))) ∈ Fin) |
12 | 4, 11 | eqeltrid 2856 | 1 ⊢ (𝜑 → (◡(𝐹 ∘ 𝐺) “ (V ∖ {𝑍})) ∈ Fin) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2111 Vcvv 3409 ∖ cdif 3855 {csn 4522 ◡ccnv 5523 “ cima 5527 ∘ ccom 5528 Fun wfun 6329 ⟶wf 6331 –1-1→wf1 6332 Fincfn 8527 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5169 ax-nul 5176 ax-pr 5298 ax-un 7459 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rab 3079 df-v 3411 df-sbc 3697 df-dif 3861 df-un 3863 df-in 3865 df-ss 3875 df-pss 3877 df-nul 4226 df-if 4421 df-pw 4496 df-sn 4523 df-pr 4525 df-tp 4527 df-op 4529 df-uni 4799 df-br 5033 df-opab 5095 df-tr 5139 df-id 5430 df-eprel 5435 df-po 5443 df-so 5444 df-fr 5483 df-we 5485 df-xp 5530 df-rel 5531 df-cnv 5532 df-co 5533 df-dm 5534 df-rn 5535 df-res 5536 df-ima 5537 df-ord 6172 df-on 6173 df-lim 6174 df-suc 6175 df-iota 6294 df-fun 6337 df-fn 6338 df-f 6339 df-f1 6340 df-fo 6341 df-f1o 6342 df-fv 6343 df-om 7580 df-1o 8112 df-en 8528 df-fin 8531 |
This theorem is referenced by: fsuppco 8899 |
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