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Mirrors > Home > ILE Home > Th. List > nn0supp | GIF version |
Description: Two ways to write the support of a function on ℕ0. (Contributed by Mario Carneiro, 29-Dec-2014.) |
Ref | Expression |
---|---|
nn0supp | ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ (V ∖ {0})) = (◡𝐹 “ ℕ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfn2 9118 | . . . 4 ⊢ ℕ = (ℕ0 ∖ {0}) | |
2 | invdif 3359 | . . . 4 ⊢ (ℕ0 ∩ (V ∖ {0})) = (ℕ0 ∖ {0}) | |
3 | 1, 2 | eqtr4i 2188 | . . 3 ⊢ ℕ = (ℕ0 ∩ (V ∖ {0})) |
4 | 3 | imaeq2i 4938 | . 2 ⊢ (◡𝐹 “ ℕ) = (◡𝐹 “ (ℕ0 ∩ (V ∖ {0}))) |
5 | ffun 5334 | . . . 4 ⊢ (𝐹:𝐼⟶ℕ0 → Fun 𝐹) | |
6 | inpreima 5605 | . . . 4 ⊢ (Fun 𝐹 → (◡𝐹 “ (ℕ0 ∩ (V ∖ {0}))) = ((◡𝐹 “ ℕ0) ∩ (◡𝐹 “ (V ∖ {0})))) | |
7 | 5, 6 | syl 14 | . . 3 ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ (ℕ0 ∩ (V ∖ {0}))) = ((◡𝐹 “ ℕ0) ∩ (◡𝐹 “ (V ∖ {0})))) |
8 | cnvimass 4961 | . . . . 5 ⊢ (◡𝐹 “ (V ∖ {0})) ⊆ dom 𝐹 | |
9 | fdm 5337 | . . . . . 6 ⊢ (𝐹:𝐼⟶ℕ0 → dom 𝐹 = 𝐼) | |
10 | fimacnv 5608 | . . . . . 6 ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ ℕ0) = 𝐼) | |
11 | 9, 10 | eqtr4d 2200 | . . . . 5 ⊢ (𝐹:𝐼⟶ℕ0 → dom 𝐹 = (◡𝐹 “ ℕ0)) |
12 | 8, 11 | sseqtrid 3187 | . . . 4 ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ (V ∖ {0})) ⊆ (◡𝐹 “ ℕ0)) |
13 | sseqin2 3336 | . . . 4 ⊢ ((◡𝐹 “ (V ∖ {0})) ⊆ (◡𝐹 “ ℕ0) ↔ ((◡𝐹 “ ℕ0) ∩ (◡𝐹 “ (V ∖ {0}))) = (◡𝐹 “ (V ∖ {0}))) | |
14 | 12, 13 | sylib 121 | . . 3 ⊢ (𝐹:𝐼⟶ℕ0 → ((◡𝐹 “ ℕ0) ∩ (◡𝐹 “ (V ∖ {0}))) = (◡𝐹 “ (V ∖ {0}))) |
15 | 7, 14 | eqtrd 2197 | . 2 ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ (ℕ0 ∩ (V ∖ {0}))) = (◡𝐹 “ (V ∖ {0}))) |
16 | 4, 15 | eqtr2id 2210 | 1 ⊢ (𝐹:𝐼⟶ℕ0 → (◡𝐹 “ (V ∖ {0})) = (◡𝐹 “ ℕ)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1342 Vcvv 2721 ∖ cdif 3108 ∩ cin 3110 ⊆ wss 3111 {csn 3570 ◡ccnv 4597 dom cdm 4598 “ cima 4601 Fun wfun 5176 ⟶wf 5178 0cc0 7744 ℕcn 8848 ℕ0cn0 9105 |
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-pow 4147 ax-pr 4181 ax-un 4405 ax-setind 4508 ax-cnex 7835 ax-resscn 7836 ax-1re 7838 ax-addrcl 7841 ax-0lt1 7850 ax-0id 7852 ax-rnegex 7853 ax-pre-ltirr 7856 ax-pre-lttrn 7858 ax-pre-ltadd 7860 |
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-nel 2430 df-ral 2447 df-rex 2448 df-rab 2451 df-v 2723 df-sbc 2947 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-id 4265 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-fv 5190 df-ov 5839 df-pnf 7926 df-mnf 7927 df-xr 7928 df-ltxr 7929 df-le 7930 df-inn 8849 df-n0 9106 |
This theorem is referenced by: (None) |
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