Theorem zindbi 37511

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 10034	. . . 4 ⊢ 0 ∈ V
2		zindbi.4	. . . 4 ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜃))
3	1, 2	sbcie 3470	. . 3 ⊢ ([0 / 𝑥]𝜑 ↔ 𝜃)
4		0z 11388	. . . . 5 ⊢ 0 ∈ ℤ
5		eleq1 2689	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ∈ ℤ ↔ 0 ∈ ℤ))
6		breq1 4656	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ≤ 𝑏 ↔ 0 ≤ 𝑏))
7	5, 6	3anbi13d 1401	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏)))
8		dfsbcq 3437	. . . . . . . . . 10 ⊢ (𝑦 = 0 → ([𝑦 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
9	8	bibi1d 333	. . . . . . . . 9 ⊢ (𝑦 = 0 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
10	7, 9	imbi12d 334	. . . . . . . 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 2689	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (𝑏 ∈ ℤ ↔ 𝐴 ∈ ℤ))
12		breq2 4657	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (0 ≤ 𝑏 ↔ 0 ≤ 𝐴))
13	11, 12	3anbi23d 1402	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → ((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)))
14		dfsbcq 3437	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → ([𝑏 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
15	14	bibi2d 332	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → (([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
16	13, 15	imbi12d 334	. . . . . . . 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 3437	. . . . . . . . . 10 ⊢ (𝑎 = 𝑦 → ([𝑎 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
18	17	bibi2d 332	. . . . . . . . 9 ⊢ (𝑎 = 𝑦 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑)))
19		dfsbcq 3437	. . . . . . . . . 10 ⊢ (𝑎 = 𝑏 → ([𝑎 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
20	19	bibi2d 332	. . . . . . . . 9 ⊢ (𝑎 = 𝑏 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
21		dfsbcq 3437	. . . . . . . . . 10 ⊢ (𝑎 = (𝑏 + 1) → ([𝑎 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
22	21	bibi2d 332	. . . . . . . . 9 ⊢ (𝑎 = (𝑏 + 1) → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
23		biidd 252	. . . . . . . . 9 ⊢ (𝑦 ∈ ℤ → ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
24		vex 3203	. . . . . . . . . . . . . . . 16 ⊢ 𝑦 ∈ V
25		zindbi.2	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓))
26	24, 25	sbcie 3470	. . . . . . . . . . . . . . 15 ⊢ ([𝑦 / 𝑥]𝜑 ↔ 𝜓)
27		dfsbcq 3437	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
28	26, 27	syl5bbr 274	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜓 ↔ [𝑏 / 𝑥]𝜑))
29		ovex 6678	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 + 1) ∈ V
30		zindbi.3	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜒))
31	29, 30	sbcie 3470	. . . . . . . . . . . . . . 15 ⊢ ([(𝑦 + 1) / 𝑥]𝜑 ↔ 𝜒)
32		oveq1 6657	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑏 → (𝑦 + 1) = (𝑏 + 1))
33	32	sbceq1d 3440	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([(𝑦 + 1) / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
34	31, 33	syl5bbr 274	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜒 ↔ [(𝑏 + 1) / 𝑥]𝜑))
35	28, 34	bibi12d 335	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑏 → ((𝜓 ↔ 𝜒) ↔ ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
36		zindbi.1	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ℤ → (𝜓 ↔ 𝜒))
37	35, 36	vtoclga 3272	. . . . . . . . . . . 12 ⊢ (𝑏 ∈ ℤ → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
38	37	3ad2ant2 1083	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
39	38	bibi2d 332	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
40	39	biimpd 219	. . . . . . . . 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 11469	. . . . . . . 8 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
42	10, 16, 41	vtocl2g 3270	. . . . . . 7 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
43	42	3adant3 1081	. . . . . 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 1411	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
46		eleq1 2689	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ∈ ℤ ↔ 𝐴 ∈ ℤ))
47		breq1 4656	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ≤ 𝑏 ↔ 𝐴 ≤ 𝑏))
48	46, 47	3anbi13d 1401	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏)))
49		dfsbcq 3437	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → ([𝑦 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
50	49	bibi1d 333	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
51	48, 50	imbi12d 334	. . . . . . . . 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 2689	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝑏 ∈ ℤ ↔ 0 ∈ ℤ))
53		breq2 4657	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝐴 ≤ 𝑏 ↔ 𝐴 ≤ 0))
54	52, 53	3anbi23d 1402	. . . . . . . . . 10 ⊢ (𝑏 = 0 → ((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0)))
55		dfsbcq 3437	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → ([𝑏 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
56	55	bibi2d 332	. . . . . . . . . 10 ⊢ (𝑏 = 0 → (([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
57	54, 56	imbi12d 334	. . . . . . . . 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 3270	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
59	58	3adant3 1081	. . . . . . 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 1412	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
62	61	bicomd 213	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
63		0re 10040	. . . . 5 ⊢ 0 ∈ ℝ
64		zre 11381	. . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
65		letric 10137	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
66	63, 64, 65	sylancr 695	. . . 4 ⊢ (𝐴 ∈ ℤ → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
67	45, 62, 66	mpjaodan 827	. . 3 ⊢ (𝐴 ∈ ℤ → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
68	3, 67	syl5bbr 274	. 2 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ [𝐴 / 𝑥]𝜑))
69		zindbi.5	. . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏))
70	69	sbcieg 3468	. 2 ⊢ (𝐴 ∈ ℤ → ([𝐴 / 𝑥]𝜑 ↔ 𝜏))
71	68, 70	bitrd 268	1 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ 𝜏))

Syntax hints:   → wi 4   ↔ wb 196   ∨ wo 383   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  [wsbc 3435   class class class wbr 4653  (class class class)co 6650  ℝcr 9935  0cc0 9936  1c1 9937   + caddc 9939   ≤ cle 10075  ℤcz 11377

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-n0 11293  df-z 11378

This theorem is referenced by:  jm2.25  37566