Theorem zindbi 36529

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 9913	. . . 4 ⊢ 0 ∈ V
2		zindbi.4	. . . 4 ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜃))
3	1, 2	sbcie 3437	. . 3 ⊢ ([0 / 𝑥]𝜑 ↔ 𝜃)
4		0z 11265	. . . . 5 ⊢ 0 ∈ ℤ
5		eleq1 2676	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ∈ ℤ ↔ 0 ∈ ℤ))
6		breq1 4586	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ≤ 𝑏 ↔ 0 ≤ 𝑏))
7	5, 6	3anbi13d 1393	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏)))
8		dfsbcq 3404	. . . . . . . . . 10 ⊢ (𝑦 = 0 → ([𝑦 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
9	8	bibi1d 332	. . . . . . . . 9 ⊢ (𝑦 = 0 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
10	7, 9	imbi12d 333	. . . . . . . 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 2676	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (𝑏 ∈ ℤ ↔ 𝐴 ∈ ℤ))
12		breq2 4587	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (0 ≤ 𝑏 ↔ 0 ≤ 𝐴))
13	11, 12	3anbi23d 1394	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → ((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)))
14		dfsbcq 3404	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → ([𝑏 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
15	14	bibi2d 331	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → (([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
16	13, 15	imbi12d 333	. . . . . . . 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 3404	. . . . . . . . . 10 ⊢ (𝑎 = 𝑦 → ([𝑎 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
18	17	bibi2d 331	. . . . . . . . 9 ⊢ (𝑎 = 𝑦 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑)))
19		dfsbcq 3404	. . . . . . . . . 10 ⊢ (𝑎 = 𝑏 → ([𝑎 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
20	19	bibi2d 331	. . . . . . . . 9 ⊢ (𝑎 = 𝑏 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
21		dfsbcq 3404	. . . . . . . . . 10 ⊢ (𝑎 = (𝑏 + 1) → ([𝑎 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
22	21	bibi2d 331	. . . . . . . . 9 ⊢ (𝑎 = (𝑏 + 1) → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
23		biidd 251	. . . . . . . . 9 ⊢ (𝑦 ∈ ℤ → ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
24		vex 3176	. . . . . . . . . . . . . . . 16 ⊢ 𝑦 ∈ V
25		zindbi.2	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓))
26	24, 25	sbcie 3437	. . . . . . . . . . . . . . 15 ⊢ ([𝑦 / 𝑥]𝜑 ↔ 𝜓)
27		dfsbcq 3404	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
28	26, 27	syl5bbr 273	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜓 ↔ [𝑏 / 𝑥]𝜑))
29		ovex 6577	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 + 1) ∈ V
30		zindbi.3	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜒))
31	29, 30	sbcie 3437	. . . . . . . . . . . . . . 15 ⊢ ([(𝑦 + 1) / 𝑥]𝜑 ↔ 𝜒)
32		oveq1 6556	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑏 → (𝑦 + 1) = (𝑏 + 1))
33	32	sbceq1d 3407	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([(𝑦 + 1) / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
34	31, 33	syl5bbr 273	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜒 ↔ [(𝑏 + 1) / 𝑥]𝜑))
35	28, 34	bibi12d 334	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑏 → ((𝜓 ↔ 𝜒) ↔ ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
36		zindbi.1	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ℤ → (𝜓 ↔ 𝜒))
37	35, 36	vtoclga 3245	. . . . . . . . . . . 12 ⊢ (𝑏 ∈ ℤ → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
38	37	3ad2ant2 1076	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
39	38	bibi2d 331	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
40	39	biimpd 218	. . . . . . . . 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 11345	. . . . . . . 8 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
42	10, 16, 41	vtocl2g 3243	. . . . . . 7 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
43	42	3adant3 1074	. . . . . 6 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
44	43	pm2.43i 50	. . . . 5 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
45	4, 44	mp3an1 1403	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
46		eleq1 2676	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ∈ ℤ ↔ 𝐴 ∈ ℤ))
47		breq1 4586	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ≤ 𝑏 ↔ 𝐴 ≤ 𝑏))
48	46, 47	3anbi13d 1393	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏)))
49		dfsbcq 3404	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → ([𝑦 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
50	49	bibi1d 332	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
51	48, 50	imbi12d 333	. . . . . . . . 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 2676	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝑏 ∈ ℤ ↔ 0 ∈ ℤ))
53		breq2 4587	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝐴 ≤ 𝑏 ↔ 𝐴 ≤ 0))
54	52, 53	3anbi23d 1394	. . . . . . . . . 10 ⊢ (𝑏 = 0 → ((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0)))
55		dfsbcq 3404	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → ([𝑏 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
56	55	bibi2d 331	. . . . . . . . . 10 ⊢ (𝑏 = 0 → (([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
57	54, 56	imbi12d 333	. . . . . . . . 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 3243	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
59	58	3adant3 1074	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
60	59	pm2.43i 50	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
61	4, 60	mp3an2 1404	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
62	61	bicomd 212	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
63		0re 9919	. . . . 5 ⊢ 0 ∈ ℝ
64		zre 11258	. . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
65		letric 10016	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
66	63, 64, 65	sylancr 694	. . . 4 ⊢ (𝐴 ∈ ℤ → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
67	45, 62, 66	mpjaodan 823	. . 3 ⊢ (𝐴 ∈ ℤ → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
68	3, 67	syl5bbr 273	. 2 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ [𝐴 / 𝑥]𝜑))
69		zindbi.5	. . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏))
70	69	sbcieg 3435	. 2 ⊢ (𝐴 ∈ ℤ → ([𝐴 / 𝑥]𝜑 ↔ 𝜏))
71	68, 70	bitrd 267	1 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ 𝜏))

Syntax hints:   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  [wsbc 3402   class class class wbr 4583  (class class class)co 6549  ℝcr 9814  0cc0 9815  1c1 9816   + caddc 9818   ≤ cle 9954  ℤcz 11254

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-n0 11170  df-z 11255

This theorem is referenced by:  jm2.25  36584