algcvga - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > algcvga		GIF version

Theorem algcvga 12053

Description: The countdown function 𝐶 remains 0 after 𝑁 steps. (Contributed by Paul Chapman, 22-Jun-2011.)

**Hypotheses**
Ref	Expression
algcvga.1	⊢ 𝐹:𝑆⟶𝑆
algcvga.2	⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
algcvga.3	⊢ 𝐶:𝑆⟶ℕ₀
algcvga.4	⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
algcvga.5	⊢ 𝑁 = (𝐶‘𝐴)

**Assertion**
Ref	Expression
algcvga	⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Distinct variable groups: 𝑧,𝐶 𝑧,𝐹 𝑧,𝑅 𝑧,𝑆 Allowed substitution hints: 𝐴(𝑧) 𝐾(𝑧) 𝑁(𝑧)

Proof of Theorem algcvga Dummy variables 𝑘 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		algcvga.5	. . 3 ⊢ 𝑁 = (𝐶‘𝐴)
2		algcvga.3	. . . 4 ⊢ 𝐶:𝑆⟶ℕ₀
3	2	ffvelcdmi 5652	. . 3 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘𝐴) ∈ ℕ₀)
4	1, 3	eqeltrid 2264	. 2 ⊢ (𝐴 ∈ 𝑆 → 𝑁 ∈ ℕ₀)
5		nn0z 9275	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℤ)
6		eluz1 9534	. . . . 5 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾)))
7		2fveq3 5522	. . . . . . . . 9 ⊢ (𝑚 = 𝑁 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑁)))
8	7	eqeq1d 2186	. . . . . . . 8 ⊢ (𝑚 = 𝑁 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑁)) = 0))
9	8	imbi2d 230	. . . . . . 7 ⊢ (𝑚 = 𝑁 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)))
10		2fveq3 5522	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑘)))
11	10	eqeq1d 2186	. . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑘)) = 0))
12	11	imbi2d 230	. . . . . . 7 ⊢ (𝑚 = 𝑘 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0)))
13		2fveq3 5522	. . . . . . . . 9 ⊢ (𝑚 = (𝑘 + 1) → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘(𝑘 + 1))))
14	13	eqeq1d 2186	. . . . . . . 8 ⊢ (𝑚 = (𝑘 + 1) → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
15	14	imbi2d 230	. . . . . . 7 ⊢ (𝑚 = (𝑘 + 1) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
16		2fveq3 5522	. . . . . . . . 9 ⊢ (𝑚 = 𝐾 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝐾)))
17	16	eqeq1d 2186	. . . . . . . 8 ⊢ (𝑚 = 𝐾 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝐾)) = 0))
18	17	imbi2d 230	. . . . . . 7 ⊢ (𝑚 = 𝐾 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
19		algcvga.1	. . . . . . . . 9 ⊢ 𝐹:𝑆⟶𝑆
20		algcvga.2	. . . . . . . . 9 ⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
21		algcvga.4	. . . . . . . . 9 ⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
22	19, 20, 2, 21, 1	algcvg 12050	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)
23	22	a1i 9	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0))
24		nn0ge0 9203	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 0 ≤ 𝑁)
25	24	adantr 276	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → 0 ≤ 𝑁)
26		nn0re 9187	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℝ)
27		zre 9259	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℝ)
28		0re 7959	. . . . . . . . . . . . . . . . . 18 ⊢ 0 ∈ ℝ
29		letr 8042	. . . . . . . . . . . . . . . . . 18 ⊢ ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ ∧ 𝑘 ∈ ℝ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
30	28, 29	mp3an1 1324	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑁 ∈ ℝ ∧ 𝑘 ∈ ℝ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
31	26, 27, 30	syl2an 289	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
32	25, 31	mpand 429	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 0 ≤ 𝑘))
33		elnn0z 9268	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ₀ ↔ (𝑘 ∈ ℤ ∧ 0 ≤ 𝑘))
34	33	simplbi2 385	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℤ → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
35	34	adantl 277	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
36	32, 35	syld 45	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
37	4, 36	sylan 283	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
38	37	impr 379	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘)) → 𝑘 ∈ ℕ₀)
39	38	expcom 116	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
40	39	3adant1 1015	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
41	40	ancld 325	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀)))
42		nn0uz 9564	. . . . . . . . . . . . 13 ⊢ ℕ₀ = (ℤ_≥‘0)
43		0zd 9267	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 0 ∈ ℤ)
44		id 19	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐴 ∈ 𝑆)
45	19	a1i 9	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐹:𝑆⟶𝑆)
46	42, 20, 43, 44, 45	algrf 12047	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ 𝑆 → 𝑅:ℕ₀⟶𝑆)
47	46	ffvelcdmda 5653	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘𝑘) ∈ 𝑆)
48		2fveq3 5522	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘(𝐹‘𝑧)) = (𝐶‘(𝐹‘(𝑅‘𝑘))))
49	48	neeq1d 2365	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) ≠ 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0))
50		fveq2 5517	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘𝑧) = (𝐶‘(𝑅‘𝑘)))
51	48, 50	breq12d 4018	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧) ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
52	49, 51	imbi12d 234	. . . . . . . . . . . . 13 ⊢ (𝑧 = (𝑅‘𝑘) → (((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)) ↔ ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘)))))
53	52, 21	vtoclga 2805	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
54	19, 2	algcvgb 12052	. . . . . . . . . . . . 13 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ↔ (((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))))
55		simpr 110	. . . . . . . . . . . . 13 ⊢ ((((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
56	54, 55	biimtrdi 163	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)))
57	53, 56	mpd 13	. . . . . . . . . . 11 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
58	47, 57	syl 14	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
59	42, 20, 43, 44, 45	algrp1 12048	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘(𝑘 + 1)) = (𝐹‘(𝑅‘𝑘)))
60	59	fveqeq2d 5525	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘(𝑘 + 1))) = 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
61	58, 60	sylibrd 169	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
62	41, 61	syl6 33	. . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
63	62	a2d 26	. . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
64	9, 12, 15, 18, 23, 63	uzind 9366	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0))
65	64	3expib 1206	. . . . 5 ⊢ (𝑁 ∈ ℤ → ((𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
66	6, 65	sylbid 150	. . . 4 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
67	5, 66	syl 14	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
68	67	com3r 79	. 2 ⊢ (𝐴 ∈ 𝑆 → (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0)))
69	4, 68	mpd 13	1 ⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 978 = wceq 1353 ∈ wcel 2148 ≠ wne 2347 {csn 3594 class class class wbr 4005 × cxp 4626 ∘ ccom 4632 ⟶wf 5214 ‘cfv 5218 (class class class)co 5877 1^st c1st 6141 ℝcr 7812 0cc0 7813 1c1 7814 + caddc 7816 < clt 7994 ≤ cle 7995 ℕ₀cn0 9178 ℤcz 9255 ℤ_≥cuz 9530 seqcseq 10447

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4120 ax-sep 4123 ax-nul 4131 ax-pow 4176 ax-pr 4211 ax-un 4435 ax-setind 4538 ax-iinf 4589 ax-cnex 7904 ax-resscn 7905 ax-1cn 7906 ax-1re 7907 ax-icn 7908 ax-addcl 7909 ax-addrcl 7910 ax-mulcl 7911 ax-addcom 7913 ax-addass 7915 ax-distr 7917 ax-i2m1 7918 ax-0lt1 7919 ax-0id 7921 ax-rnegex 7922 ax-cnre 7924 ax-pre-ltirr 7925 ax-pre-ltwlin 7926 ax-pre-lttrn 7927 ax-pre-apti 7928 ax-pre-ltadd 7929

This theorem depends on definitions: df-bi 117 df-stab 831 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rab 2464 df-v 2741 df-sbc 2965 df-csb 3060 df-dif 3133 df-un 3135 df-in 3137 df-ss 3144 df-nul 3425 df-pw 3579 df-sn 3600 df-pr 3601 df-op 3603 df-uni 3812 df-int 3847 df-iun 3890 df-br 4006 df-opab 4067 df-mpt 4068 df-tr 4104 df-id 4295 df-iord 4368 df-on 4370 df-ilim 4371 df-suc 4373 df-iom 4592 df-xp 4634 df-rel 4635 df-cnv 4636 df-co 4637 df-dm 4638 df-rn 4639 df-res 4640 df-ima 4641 df-iota 5180 df-fun 5220 df-fn 5221 df-f 5222 df-f1 5223 df-fo 5224 df-f1o 5225 df-fv 5226 df-riota 5833 df-ov 5880 df-oprab 5881 df-mpo 5882 df-1st 6143 df-2nd 6144 df-recs 6308 df-frec 6394 df-pnf 7996 df-mnf 7997 df-xr 7998 df-ltxr 7999 df-le 8000 df-sub 8132 df-neg 8133 df-inn 8922 df-n0 9179 df-z 9256 df-uz 9531 df-seqfrec 10448

This theorem is referenced by: algfx 12054 eucalgcvga 12060

W3C validator