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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 11019 | . . . 4 ⊢ 0 ∈ V | |
2 | ffsuppbi 9205 | . . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 0 ∈ V) → (𝐹:𝐼⟶ℕ0 → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin))) | |
3 | 1, 2 | mpan2 689 | . . 3 ⊢ (𝐼 ∈ 𝑉 → (𝐹:𝐼⟶ℕ0 → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin))) |
4 | 3 | imp 408 | . 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐹:𝐼⟶ℕ0) → (𝐹 finSupp 0 ↔ (◡𝐹 “ (ℕ0 ∖ {0})) ∈ Fin)) |
5 | dfn2 12296 | . . . 4 ⊢ ℕ = (ℕ0 ∖ {0}) | |
6 | 5 | imaeq2i 5977 | . . 3 ⊢ (◡𝐹 “ ℕ) = (◡𝐹 “ (ℕ0 ∖ {0})) |
7 | 6 | eleq1i 2827 | . 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 205 ∧ wa 397 ∈ wcel 2104 Vcvv 3437 ∖ cdif 3889 {csn 4565 class class class wbr 5081 ◡ccnv 5599 “ cima 5603 ⟶wf 6454 Fincfn 8764 finSupp cfsupp 9176 0cc0 10921 ℕcn 12023 ℕ0cn0 12283 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3305 df-rab 3306 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-2nd 7864 df-supp 8009 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-fsupp 9177 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-nn 12024 df-n0 12284 |
This theorem is referenced by: psrbagfsuppOLD 21173 snifpsrbag 21174 |
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