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| Mirrors > Home > MPE Home > Th. List > fcdmnn0fsupp | Structured version Visualization version GIF version | ||
| Description: A function into ℕ0 is finitely supported iff its support is finite. (Contributed by AV, 8-Jul-2019.) |
| Ref | Expression |
|---|---|
| fcdmnn0fsupp | ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹:𝐼⟶ℕ0) → (𝐹 finSupp 0 ↔ (◡𝐹 “ ℕ) ∈ Fin)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c0ex 11101 | . . . 4 ⊢ 0 ∈ V | |
| 2 | ffsuppbi 9277 | . . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 0 ∈ V) → (𝐹:𝐼⟶ℕ0 → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin))) | |
| 3 | 1, 2 | mpan2 691 | . . 3 ⊢ (𝐼 ∈ 𝑉 → (𝐹:𝐼⟶ℕ0 → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin))) |
| 4 | 3 | imp 406 | . 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹:𝐼⟶ℕ0) → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin)) |
| 5 | dfn2 12389 | . . . 4 ⊢ ℕ = (ℕ0 ∖ {0}) | |
| 6 | 5 | imaeq2i 6002 | . . 3 ⊢ (◡𝐹 “ ℕ) = (◡𝐹 “ (ℕ0 ∖ {0})) |
| 7 | 6 | eleq1i 2822 | . 2 ⊢ ((◡𝐹 “ ℕ) ∈ Fin ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin) |
| 8 | 4, 7 | bitr4di 289 | 1 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹:𝐼⟶ℕ0) → (𝐹 finSupp 0 ↔ (◡𝐹 “ ℕ) ∈ Fin)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2111 Vcvv 3436 ∖ cdif 3894 {csn 4571 class class class wbr 5086 ◡ccnv 5610 “ cima 5614 ⟶wf 6472 Fincfn 8864 finSupp cfsupp 9240 0cc0 11001 ℕcn 12120 ℕ0cn0 12376 |
| 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 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5212 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-resscn 11058 ax-1cn 11059 ax-icn 11060 ax-addcl 11061 ax-addrcl 11062 ax-mulcl 11063 ax-mulrcl 11064 ax-mulcom 11065 ax-addass 11066 ax-mulass 11067 ax-distr 11068 ax-i2m1 11069 ax-1ne0 11070 ax-1rid 11071 ax-rnegex 11072 ax-rrecex 11073 ax-cnre 11074 ax-pre-lttri 11075 ax-pre-lttrn 11076 ax-pre-ltadd 11077 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-2nd 7917 df-supp 8086 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-er 8617 df-en 8865 df-dom 8866 df-sdom 8867 df-fsupp 9241 df-pnf 11143 df-mnf 11144 df-xr 11145 df-ltxr 11146 df-le 11147 df-nn 12121 df-n0 12377 |
| This theorem is referenced by: snifpsrbag 21852 |
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