Theorem zindbi 42979

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 11101	. . . 4 ⊢ 0 ∈ V
2		zindbi.4	. . . 4 ⊢ (𝑥 = 0 → (𝜑 ↔ 𝜃))
3	1, 2	sbcie 3778	. . 3 ⊢ ([0 / 𝑥]𝜑 ↔ 𝜃)
4		0z 12474	. . . . 5 ⊢ 0 ∈ ℤ
5		eleq1 2819	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ∈ ℤ ↔ 0 ∈ ℤ))
6		breq1 5089	. . . . . . . . . 10 ⊢ (𝑦 = 0 → (𝑦 ≤ 𝑏 ↔ 0 ≤ 𝑏))
7	5, 6	3anbi13d 1440	. . . . . . . . 9 ⊢ (𝑦 = 0 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏)))
8		dfsbcq 3738	. . . . . . . . . 10 ⊢ (𝑦 = 0 → ([𝑦 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
9	8	bibi1d 343	. . . . . . . . 9 ⊢ (𝑦 = 0 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
10	7, 9	imbi12d 344	. . . . . . . 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 2819	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (𝑏 ∈ ℤ ↔ 𝐴 ∈ ℤ))
12		breq2 5090	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → (0 ≤ 𝑏 ↔ 0 ≤ 𝐴))
13	11, 12	3anbi23d 1441	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → ((0 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 0 ≤ 𝑏) ↔ (0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴)))
14		dfsbcq 3738	. . . . . . . . . 10 ⊢ (𝑏 = 𝐴 → ([𝑏 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
15	14	bibi2d 342	. . . . . . . . 9 ⊢ (𝑏 = 𝐴 → (([0 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
16	13, 15	imbi12d 344	. . . . . . . 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 3738	. . . . . . . . . 10 ⊢ (𝑎 = 𝑦 → ([𝑎 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
18	17	bibi2d 342	. . . . . . . . 9 ⊢ (𝑎 = 𝑦 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑)))
19		dfsbcq 3738	. . . . . . . . . 10 ⊢ (𝑎 = 𝑏 → ([𝑎 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
20	19	bibi2d 342	. . . . . . . . 9 ⊢ (𝑎 = 𝑏 → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
21		dfsbcq 3738	. . . . . . . . . 10 ⊢ (𝑎 = (𝑏 + 1) → ([𝑎 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
22	21	bibi2d 342	. . . . . . . . 9 ⊢ (𝑎 = (𝑏 + 1) → (([𝑦 / 𝑥]𝜑 ↔ [𝑎 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
23		biidd 262	. . . . . . . . 9 ⊢ (𝑦 ∈ ℤ → ([𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑))
24		vex 3440	. . . . . . . . . . . . . . . 16 ⊢ 𝑦 ∈ V
25		zindbi.2	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓))
26	24, 25	sbcie 3778	. . . . . . . . . . . . . . 15 ⊢ ([𝑦 / 𝑥]𝜑 ↔ 𝜓)
27		dfsbcq 3738	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
28	26, 27	bitr3id 285	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜓 ↔ [𝑏 / 𝑥]𝜑))
29		ovex 7374	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 + 1) ∈ V
30		zindbi.3	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = (𝑦 + 1) → (𝜑 ↔ 𝜒))
31	29, 30	sbcie 3778	. . . . . . . . . . . . . . 15 ⊢ ([(𝑦 + 1) / 𝑥]𝜑 ↔ 𝜒)
32		oveq1 7348	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑏 → (𝑦 + 1) = (𝑏 + 1))
33	32	sbceq1d 3741	. . . . . . . . . . . . . . 15 ⊢ (𝑦 = 𝑏 → ([(𝑦 + 1) / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
34	31, 33	bitr3id 285	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑏 → (𝜒 ↔ [(𝑏 + 1) / 𝑥]𝜑))
35	28, 34	bibi12d 345	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑏 → ((𝜓 ↔ 𝜒) ↔ ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
36		zindbi.1	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ ℤ → (𝜓 ↔ 𝜒))
37	35, 36	vtoclga 3528	. . . . . . . . . . . 12 ⊢ (𝑏 ∈ ℤ → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
38	37	3ad2ant2 1134	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑏 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑))
39	38	bibi2d 342	. . . . . . . . . 10 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝑦 / 𝑥]𝜑 ↔ [(𝑏 + 1) / 𝑥]𝜑)))
40	39	biimpd 229	. . . . . . . . 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 12560	. . . . . . . 8 ⊢ ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) → ([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑))
42	10, 16, 41	vtocl2g 3525	. . . . . . 7 ⊢ ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ) → ((0 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑)))
43	42	3adant3 1132	. . . . . 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 1450	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 0 ≤ 𝐴) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
46		eleq1 2819	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ∈ ℤ ↔ 𝐴 ∈ ℤ))
47		breq1 5089	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → (𝑦 ≤ 𝑏 ↔ 𝐴 ≤ 𝑏))
48	46, 47	3anbi13d 1440	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → ((𝑦 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝑦 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏)))
49		dfsbcq 3738	. . . . . . . . . . 11 ⊢ (𝑦 = 𝐴 → ([𝑦 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
50	49	bibi1d 343	. . . . . . . . . 10 ⊢ (𝑦 = 𝐴 → (([𝑦 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑)))
51	48, 50	imbi12d 344	. . . . . . . . 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 2819	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝑏 ∈ ℤ ↔ 0 ∈ ℤ))
53		breq2 5090	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → (𝐴 ≤ 𝑏 ↔ 𝐴 ≤ 0))
54	52, 53	3anbi23d 1441	. . . . . . . . . 10 ⊢ (𝑏 = 0 → ((𝐴 ∈ ℤ ∧ 𝑏 ∈ ℤ ∧ 𝐴 ≤ 𝑏) ↔ (𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0)))
55		dfsbcq 3738	. . . . . . . . . . 11 ⊢ (𝑏 = 0 → ([𝑏 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
56	55	bibi2d 342	. . . . . . . . . 10 ⊢ (𝑏 = 0 → (([𝐴 / 𝑥]𝜑 ↔ [𝑏 / 𝑥]𝜑) ↔ ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
57	54, 56	imbi12d 344	. . . . . . . . 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 3525	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ) → ((𝐴 ∈ ℤ ∧ 0 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑)))
59	58	3adant3 1132	. . . . . . 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 1451	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([𝐴 / 𝑥]𝜑 ↔ [0 / 𝑥]𝜑))
62	61	bicomd 223	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝐴 ≤ 0) → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
63		0re 11109	. . . . 5 ⊢ 0 ∈ ℝ
64		zre 12467	. . . . 5 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ)
65		letric 11208	. . . . 5 ⊢ ((0 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
66	63, 64, 65	sylancr 587	. . . 4 ⊢ (𝐴 ∈ ℤ → (0 ≤ 𝐴 ∨ 𝐴 ≤ 0))
67	45, 62, 66	mpjaodan 960	. . 3 ⊢ (𝐴 ∈ ℤ → ([0 / 𝑥]𝜑 ↔ [𝐴 / 𝑥]𝜑))
68	3, 67	bitr3id 285	. 2 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ [𝐴 / 𝑥]𝜑))
69		zindbi.5	. . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏))
70	69	sbcieg 3776	. 2 ⊢ (𝐴 ∈ ℤ → ([𝐴 / 𝑥]𝜑 ↔ 𝜏))
71	68, 70	bitrd 279	1 ⊢ (𝐴 ∈ ℤ → (𝜃 ↔ 𝜏))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∨ wo 847   ∧ w3a 1086   = wceq 1541   ∈ wcel 2111  [wsbc 3736   class class class wbr 5086  (class class class)co 7341  ℝcr 11000  0cc0 11001  1c1 11002   + caddc 11004   ≤ cle 11142  ℤcz 12463

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 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-sep 5229  ax-nul 5239  ax-pow 5298  ax-pr 5365  ax-un 7663  ax-resscn 11058  ax-1cn 11059  ax-icn 11060  ax-addcl 11061  ax-addrcl 11062  ax-mulcl 11063  ax-mulrcl 11064  ax-mulcom 11065  ax-addass 11066  ax-mulass 11067  ax-distr 11068  ax-i2m1 11069  ax-1ne0 11070  ax-1rid 11071  ax-rnegex 11072  ax-rrecex 11073  ax-cnre 11074  ax-pre-lttri 11075  ax-pre-lttrn 11076  ax-pre-ltadd 11077  ax-pre-mulgt0 11078

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-nel 3033  df-ral 3048  df-rex 3057  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4279  df-if 4471  df-pw 4547  df-sn 4572  df-pr 4574  df-op 4578  df-uni 4855  df-iun 4938  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5506  df-eprel 5511  df-po 5519  df-so 5520  df-fr 5564  df-we 5566  df-xp 5617  df-rel 5618  df-cnv 5619  df-co 5620  df-dm 5621  df-rn 5622  df-res 5623  df-ima 5624  df-pred 6243  df-ord 6304  df-on 6305  df-lim 6306  df-suc 6307  df-iota 6432  df-fun 6478  df-fn 6479  df-f 6480  df-f1 6481  df-fo 6482  df-f1o 6483  df-fv 6484  df-riota 7298  df-ov 7344  df-oprab 7345  df-mpo 7346  df-om 7792  df-2nd 7917  df-frecs 8206  df-wrecs 8237  df-recs 8286  df-rdg 8324  df-er 8617  df-en 8865  df-dom 8866  df-sdom 8867  df-pnf 11143  df-mnf 11144  df-xr 11145  df-ltxr 11146  df-le 11147  df-sub 11341  df-neg 11342  df-nn 12121  df-n0 12377  df-z 12464

This theorem is referenced by:  jm2.25  43032