Theorem zindbi 39887

Description: Inductively transfer a property to the integers if it holds for zero and passes between adjacent integers in either direction. (Contributed by Stefan O'Rear, 1-Oct-2014.)

Hypotheses

Ref	Expression
zindbi.1	⊢ (𝑦 ∈ ℤ → (𝜓 ↔ 𝜒))
zindbi.2	⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓))
zindbi.3	⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜒))
zindbi.4	⊢ (𝑥 = 0 → (𝜑 ↔ 𝜃))
zindbi.5	⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏))

Assertion

Ref	Expression
zindbi	⊢ (𝐴 ∈ ℤ → (𝜃 ↔ 𝜏))

Distinct variable groups:   𝜑,𝑦   𝑥,𝐴,𝑦   𝜓,𝑥   𝜒,𝑥   𝜃,𝑥   𝜏,𝑥

Allowed substitution hints:   𝜑(𝑥)   𝜓(𝑦)   𝜒(𝑦)   𝜃(𝑦)   𝜏(𝑦)

Proof of Theorem zindbi

Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		c0ex 10624	. . . 4 ⊢ 0 ∈ V
2		zindbi.4	. . . 4 ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜃))
3	1, 2	sbcie 3760	. . 3 ⊢ ([0 / 𝑥]𝜑 ↔ 𝜃)
4		0z 11980	. . . . 5 ⊢ 0 ∈ ℤ
5		eleq1 2877	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ∈ ℤ ↔ 0 ∈ ℤ))
6		breq1 5033	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ≤ 𝑏 ↔ 0 ≤ 𝑏))
7	5, 6	3anbi13d 1435	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏)))
8		dfsbcq 3722	. . . . . . . . . 10 ⊢ (𝑦 = 0 → ([𝑦 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
9	8	bibi1d 347	. . . . . . . . 9 ⊢ (𝑦 = 0 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
10	7, 9	imbi12d 348	. . . . . . . 8 ⊢ (𝑦 = 0 → (((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)) ↔ ((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) → ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))))
11		eleq1 2877	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (𝑏 ∈ ℤ ↔ 𝐴 ∈ ℤ))
12		breq2 5034	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (0 ≤ 𝑏 ↔ 0 ≤ 𝐴))
13	11, 12	3anbi23d 1436	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → ((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)))
14		dfsbcq 3722	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → ([𝑏 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
15	14	bibi2d 346	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → (([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
16	13, 15	imbi12d 348	. . . . . . . 8 ⊢ (𝑏 = 𝐴 → (((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) → ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)) ↔ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))))
17		dfsbcq 3722	. . . . . . . . . 10 ⊢ (𝑎 = 𝑦 → ([𝑎 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
18	17	bibi2d 346	. . . . . . . . 9 ⊢ (𝑎 = 𝑦 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑)))
19		dfsbcq 3722	. . . . . . . . . 10 ⊢ (𝑎 = 𝑏 → ([𝑎 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
20	19	bibi2d 346	. . . . . . . . 9 ⊢ (𝑎 = 𝑏 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
21		dfsbcq 3722	. . . . . . . . . 10 ⊢ (𝑎 = (𝑏 + 1) → ([𝑎 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
22	21	bibi2d 346	. . . . . . . . 9 ⊢ (𝑎 = (𝑏 + 1) → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
23		biidd 265	. . . . . . . . 9 ⊢ (𝑦 ∈ ℤ → ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
24		vex 3444	. . . . . . . . . . . . . . . 16 ⊢ 𝑦 ∈ V
25		zindbi.2	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓))
26	24, 25	sbcie 3760	. . . . . . . . . . . . . . 15 ⊢ ([𝑦 / 𝑥]𝜑 ↔ 𝜓)
27		dfsbcq 3722	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
28	26, 27	bitr3id 288	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜓 ↔ [𝑏 / 𝑥]𝜑))
29		ovex 7168	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 + 1) ∈ V
30		zindbi.3	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜒))
31	29, 30	sbcie 3760	. . . . . . . . . . . . . . 15 ⊢ ([(𝑦 + 1) / 𝑥]𝜑 ↔ 𝜒)
32		oveq1 7142	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑏 → (𝑦 + 1) = (𝑏 + 1))
33	32	sbceq1d 3725	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([(𝑦 + 1) / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
34	31, 33	bitr3id 288	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜒 ↔ [(𝑏 + 1) / 𝑥]𝜑))
35	28, 34	bibi12d 349	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑏 → ((𝜓 ↔ 𝜒) ↔ ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
36		zindbi.1	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ℤ → (𝜓 ↔ 𝜒))
37	35, 36	vtoclga 3522	. . . . . . . . . . . 12 ⊢ (𝑏 ∈ ℤ → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
38	37	3ad2ant2 1131	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
39	38	bibi2d 346	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
40	39	biimpd 232	. . . . . . . . 9 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) → ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
41	18, 20, 22, 20, 23, 40	uzind 12062	. . . . . . . 8 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
42	10, 16, 41	vtocl2g 3520	. . . . . . 7 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
43	42	3adant3 1129	. . . . . 6 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
44	43	pm2.43i 52	. . . . 5 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
45	4, 44	mp3an1 1445	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
46		eleq1 2877	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ∈ ℤ ↔ 𝐴 ∈ ℤ))
47		breq1 5033	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ≤ 𝑏 ↔ 𝐴 ≤ 𝑏))
48	46, 47	3anbi13d 1435	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏)))
49		dfsbcq 3722	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → ([𝑦 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
50	49	bibi1d 347	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
51	48, 50	imbi12d 348	. . . . . . . . 9 ⊢ (𝑦 = 𝐴 → (((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)) ↔ ((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) → ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))))
52		eleq1 2877	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝑏 ∈ ℤ ↔ 0 ∈ ℤ))
53		breq2 5034	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝐴 ≤ 𝑏 ↔ 𝐴 ≤ 0))
54	52, 53	3anbi23d 1436	. . . . . . . . . 10 ⊢ (𝑏 = 0 → ((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0)))
55		dfsbcq 3722	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → ([𝑏 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
56	55	bibi2d 346	. . . . . . . . . 10 ⊢ (𝑏 = 0 → (([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
57	54, 56	imbi12d 348	. . . . . . . . 9 ⊢ (𝑏 = 0 → (((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) → ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)) ↔ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))))
58	51, 57, 41	vtocl2g 3520	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
59	58	3adant3 1129	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
60	59	pm2.43i 52	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
61	4, 60	mp3an2 1446	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
62	61	bicomd 226	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
63		0re 10632	. . . . 5 ⊢ 0 ∈ ℝ
64		zre 11973	. . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
65		letric 10729	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
66	63, 64, 65	sylancr 590	. . . 4 ⊢ (𝐴 ∈ ℤ → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
67	45, 62, 66	mpjaodan 956	. . 3 ⊢ (𝐴 ∈ ℤ → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
68	3, 67	bitr3id 288	. 2 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ [𝐴 / 𝑥]𝜑))
69		zindbi.5	. . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏))
70	69	sbcieg 3758	. 2 ⊢ (𝐴 ∈ ℤ → ([𝐴 / 𝑥]𝜑 ↔ 𝜏))
71	68, 70	bitrd 282	1 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ 𝜏))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   ∨ wo 844   ∧ w3a 1084   = wceq 1538   ∈ wcel 2111  [wsbc 3720   class class class wbr 5030  (class class class)co 7135  ℝcr 10525  0cc0 10526  1c1 10527   + caddc 10529   ≤ cle 10665  ℤcz 11969

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441  ax-resscn 10583  ax-1cn 10584  ax-icn 10585  ax-addcl 10586  ax-addrcl 10587  ax-mulcl 10588  ax-mulrcl 10589  ax-mulcom 10590  ax-addass 10591  ax-mulass 10592  ax-distr 10593  ax-i2m1 10594  ax-1ne0 10595  ax-1rid 10596  ax-rnegex 10597  ax-rrecex 10598  ax-cnre 10599  ax-pre-lttri 10600  ax-pre-lttrn 10601  ax-pre-ltadd 10602  ax-pre-mulgt0 10603

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-nel 3092  df-ral 3111  df-rex 3112  df-reu 3113  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-riota 7093  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-er 8272  df-en 8493  df-dom 8494  df-sdom 8495  df-pnf 10666  df-mnf 10667  df-xr 10668  df-ltxr 10669  df-le 10670  df-sub 10861  df-neg 10862  df-nn 11626  df-n0 11886  df-z 11970

This theorem is referenced by:  jm2.25  39940