Theorem rabssnn0fi 13357

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.)

Assertion

Ref	Expression
rabssnn0fi	⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑))

Distinct variable groups:   𝑥,𝑠   𝜑,𝑠

Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem rabssnn0fi

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ssrab2 4058	. 2 ⊢ {𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0
2		ssnn0fi 13356	. . 3 ⊢ ({𝑥 ∈ ℕ0 ∣ 𝜑} ⊆ ℕ0 → ({𝑥 ∈ ℕ0 ∣ 𝜑} ∈ Fin ↔ ∃𝑠 ∈ ℕ0 ∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑})))
3		nnel 3134	. . . . . . . . . 10 ⊢ (¬ 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ 𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑})
4		nfcv 2979	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥𝑦
5		nfcv 2979	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥ℕ0
6		nfsbc1v 3794	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑥[𝑦 / 𝑥] ¬ 𝜑
7	6	nfn 1857	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥 ¬ [𝑦 / 𝑥] ¬ 𝜑
8		sbceq2a 3786	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑥 → ([𝑦 / 𝑥] ¬ 𝜑 ↔ ¬ 𝜑))
9	8	equcoms 2027	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → ([𝑦 / 𝑥] ¬ 𝜑 ↔ ¬ 𝜑))
10	9	con2bid 357	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑))
11	4, 5, 7, 10	elrabf 3678	. . . . . . . . . . 11 ⊢ (𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ (𝑦 ∈ ℕ0 ∧ ¬ [𝑦 / 𝑥] ¬ 𝜑))
12	11	baib 538	. . . . . . . . . 10 ⊢ (𝑦 ∈ ℕ0 → (𝑦 ∈ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑))
13	3, 12	syl5bb 285	. . . . . . . . 9 ⊢ (𝑦 ∈ ℕ0 → (¬ 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑} ↔ ¬ [𝑦 / 𝑥] ¬ 𝜑))
14	13	con4bid 319	. . . . . . . 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 3166	. . . . . 6 ⊢ (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → 𝑦 ∉ {𝑥 ∈ ℕ0 ∣ 𝜑}) ↔ ∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑))
17		nfv 1915	. . . . . . . 8 ⊢ Ⅎ𝑥 𝑠 < 𝑦
18	17, 6	nfim 1897	. . . . . . 7 ⊢ Ⅎ𝑥(𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑)
19		nfv 1915	. . . . . . 7 ⊢ Ⅎ𝑦(𝑠 < 𝑥 → ¬ 𝜑)
20		breq2 5072	. . . . . . . 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 3443	. . . . . 6 ⊢ (∀𝑦 ∈ ℕ0 (𝑠 < 𝑦 → [𝑦 / 𝑥] ¬ 𝜑) ↔ ∀𝑥 ∈ ℕ0 (𝑠 < 𝑥 → ¬ 𝜑))
23	16, 22	bitri 277	. . . . 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 3298	. . 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 281	. 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))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∈ wcel 2114   ∉ wnel 3125  ∀wral 3140  ∃wrex 3141  {crab 3144  [wsbc 3774   ⊆ wss 3938   class class class wbr 5068  Fincfn 8511   < clt 10677  ℕ₀cn0 11900

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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-1o 8104  df-er 8291  df-en 8512  df-dom 8513  df-sdom 8514  df-fin 8515  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-nn 11641  df-n0 11901  df-z 11985  df-uz 12247  df-fz 12896

This theorem is referenced by:  fsuppmapnn0ub  13366  mptnn0fsupp  13368  mptnn0fsuppr  13370  pmatcollpw2lem  21387