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| Mirrors > Home > MPE Home > Th. List > rabssnn0fi | Structured version Visualization version GIF version | ||
| Description: A subset of the nonnegative integers defined by a restricted class abstraction is finite if there is a nonnegative integer so that for all integers greater than this integer the condition of the class abstraction is not fulfilled. (Contributed by AV, 3-Oct-2019.) |
| Ref | Expression |
|---|---|
| rabssnn0fi | ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssrab2 4042 | . 2 ⊢ {𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 | |
| 2 | ssnn0fi 14021 | . . 3 ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 → ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}))) | |
| 3 | nnel 3080 | . . . . . . . . . 10 ⊢ (¬ 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ 𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑}) | |
| 4 | nfcv 2931 | . . . . . . . . . . . 12 ⊢ Ⅎ𝑥𝑦 | |
| 5 | nfcv 2931 | . . . . . . . . . . . 12 ⊢ Ⅎ𝑥ℕ0 | |
| 6 | nfsbc1v 3773 | . . . . . . . . . . . . 13 ⊢ Ⅎ𝑥[𝑦 / 𝑥] ¬ 𝜑 | |
| 7 | 6 | nfn 1884 | . . . . . . . . . . . 12 ⊢ Ⅎ𝑥 ¬ [𝑦 / 𝑥] ¬ 𝜑 |
| 8 | sbceq2a 3765 | . . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑥 → ([𝑦 / 𝑥] ¬ 𝜑 ↔ ¬ 𝜑)) | |
| 9 | 8 | equcoms 2047 | . . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → ([𝑦 / 𝑥] ¬ 𝜑 ↔ ¬ 𝜑)) |
| 10 | 9 | con2bid 357 | . . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑)) |
| 11 | 4, 5, 7, 10 | elrabf 3656 | . . . . . . . . . . 11 ⊢ (𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ (𝑦 ∈ ℕ0 ∧ ¬ [𝑦 / 𝑥] ¬ 𝜑)) |
| 12 | 11 | baib 544 | . . . . . . . . . 10 ⊢ (𝑦 ∈ ℕ0 → (𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑)) |
| 13 | 3, 12 | bitrid 286 | . . . . . . . . 9 ⊢ (𝑦 ∈ ℕ0 → (¬ 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑)) |
| 14 | 13 | con4bid 320 | . . . . . . . 8 ⊢ (𝑦 ∈ ℕ0 → (𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ [𝑦 / 𝑥] ¬ 𝜑)) |
| 15 | 14 | imbi2d 343 | . . . . . . 7 ⊢ (𝑦 ∈ ℕ0 → ((𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ (𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑))) |
| 16 | 15 | ralbiia 3115 | . . . . . 6 ⊢ (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ ∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑)) |
| 17 | nfv 1941 | . . . . . . . 8 ⊢ Ⅎ𝑥 𝑠 < 𝑦 | |
| 18 | 17, 6 | nfim 1923 | . . . . . . 7 ⊢ Ⅎ𝑥(𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑) |
| 19 | nfv 1941 | . . . . . . 7 ⊢ Ⅎ𝑦(𝑠 < 𝑥 → ¬ 𝜑) | |
| 20 | breq2 5117 | . . . . . . . 8 ⊢ (𝑦 = 𝑥 → (𝑠 < 𝑦 ↔ 𝑠 < 𝑥)) | |
| 21 | 20, 8 | imbi12d 347 | . . . . . . 7 ⊢ (𝑦 = 𝑥 → ((𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑) ↔ (𝑠 < 𝑥 → ¬ 𝜑))) |
| 22 | 18, 19, 21 | cbvralw 3313 | . . . . . 6 ⊢ (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑) ↔ ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑)) |
| 23 | 16, 22 | bitri 278 | . . . . 5 ⊢ (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑)) |
| 24 | 23 | a1i 11 | . . . 4 ⊢ (({𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 ∧ 𝑠 ∈ ℕ0) → (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑))) |
| 25 | 24 | rexbidva 3193 | . . 3 ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 → (∃𝑠 ∈ ℕ0 ∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ ∃𝑠 ∈ ℕ0 ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑))) |
| 26 | 2, 25 | bitrd 282 | . 2 ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 → ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑))) |
| 27 | 1, 26 | ax-mp 5 | 1 ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2149 ∉ wnel 3070 ∀wral 3085 ∃wrex 3095 {crab 3423 [wsbc 3753 ⊆ wss 3913 class class class wbr 5113 Fincfn 8943 < clt 11243 ℕ0cn0 12504 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-addrcl 11161 ax-mulcl 11162 ax-mulrcl 11163 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-i2m1 11168 ax-1ne0 11169 ax-1rid 11170 ax-rnegex 11171 ax-rrecex 11172 ax-cnre 11173 ax-pre-lttri 11174 ax-pre-lttrn 11175 ax-pre-ltadd 11176 ax-pre-mulgt0 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8453 df-er 8694 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-pnf 11245 df-mnf 11246 df-xr 11247 df-ltxr 11248 df-le 11249 df-sub 11443 df-neg 11444 df-nn 12234 df-n0 12505 df-z 12592 df-uz 12863 df-fz 13536 |
| This theorem is referenced by: fsuppmapnn0ub 14031 mptnn0fsupp 14033 mptnn0fsuppr 14035 pmatcollpw2lem 22903 |
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