Theorem exbtwnzlemstep 10204

Description: Lemma for exbtwnzlemex 10206. Induction step. (Contributed by Jim Kingdon, 10-May-2022.)

Hypotheses

Ref	Expression
exbtwnzlemstep.k	⊢ (𝜑 → 𝐾 ∈ ℕ)
exbtwnzlemstep.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
exbtwnzlemstep.tri	⊢ ((𝜑 ∧ 𝑛 ∈ ℤ) → (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))

Assertion

Ref	Expression
exbtwnzlemstep	⊢ ((𝜑 ∧ ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)))

Distinct variable groups:   𝐴,𝑚,𝑛   𝑚,𝐾,𝑛   𝜑,𝑚,𝑛

Proof of Theorem exbtwnzlemstep

Dummy variable 𝑗 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpllr 529	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝑚 ∈ ℤ)
2		exbtwnzlemstep.k	. . . . . . . . . 10 ⊢ (𝜑 → 𝐾 ∈ ℕ)
3	2	ad3antrrr 489	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℕ)
4	3	nnzd 9333	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℤ)
5	1, 4	zaddcld 9338	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → (𝑚 + 𝐾) ∈ ℤ)
6		simpr 109	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → (𝑚 + 𝐾) ≤ 𝐴)
7		exbtwnzlemstep.a	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ∈ ℝ)
8	7	ad3antrrr 489	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 ∈ ℝ)
9	5	zred 9334	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → (𝑚 + 𝐾) ∈ ℝ)
10		1red 7935	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ∈ ℝ)
11	9, 10	readdcld 7949	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 1) ∈ ℝ)
12	3	nnred 8891	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℝ)
13	9, 12	readdcld 7949	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 𝐾) ∈ ℝ)
14		simplrr 531	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < (𝑚 + (𝐾 + 1)))
15	1	zcnd 9335	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝑚 ∈ ℂ)
16	3	nncnd 8892	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℂ)
17		1cnd 7936	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ∈ ℂ)
18	15, 16, 17	addassd 7942	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 1) = (𝑚 + (𝐾 + 1)))
19	14, 18	breqtrrd 4017	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < ((𝑚 + 𝐾) + 1))
20	3	nnge1d 8921	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ≤ 𝐾)
21	10, 12, 9, 20	leadd2dd 8479	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 1) ≤ ((𝑚 + 𝐾) + 𝐾))
22	8, 11, 13, 19, 21	ltletrd 8342	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < ((𝑚 + 𝐾) + 𝐾))
23		breq1 3992	. . . . . . . . 9 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝑗 ≤ 𝐴 ↔ (𝑚 + 𝐾) ≤ 𝐴))
24		oveq1 5860	. . . . . . . . . 10 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝑗 + 𝐾) = ((𝑚 + 𝐾) + 𝐾))
25	24	breq2d 4001	. . . . . . . . 9 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝐴 < (𝑗 + 𝐾) ↔ 𝐴 < ((𝑚 + 𝐾) + 𝐾)))
26	23, 25	anbi12d 470	. . . . . . . 8 ⊢ (𝑗 = (𝑚 + 𝐾) → ((𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)) ↔ ((𝑚 + 𝐾) ≤ 𝐴 ∧ 𝐴 < ((𝑚 + 𝐾) + 𝐾))))
27	26	rspcev 2834	. . . . . . 7 ⊢ (((𝑚 + 𝐾) ∈ ℤ ∧ ((𝑚 + 𝐾) ≤ 𝐴 ∧ 𝐴 < ((𝑚 + 𝐾) + 𝐾))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
28	5, 6, 22, 27	syl12anc 1231	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
29		simpllr 529	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝑚 ∈ ℤ)
30		simplrl 530	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝑚 ≤ 𝐴)
31		simpr 109	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝐴 < (𝑚 + 𝐾))
32		breq1 3992	. . . . . . . . 9 ⊢ (𝑗 = 𝑚 → (𝑗 ≤ 𝐴 ↔ 𝑚 ≤ 𝐴))
33		oveq1 5860	. . . . . . . . . 10 ⊢ (𝑗 = 𝑚 → (𝑗 + 𝐾) = (𝑚 + 𝐾))
34	33	breq2d 4001	. . . . . . . . 9 ⊢ (𝑗 = 𝑚 → (𝐴 < (𝑗 + 𝐾) ↔ 𝐴 < (𝑚 + 𝐾)))
35	32, 34	anbi12d 470	. . . . . . . 8 ⊢ (𝑗 = 𝑚 → ((𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)) ↔ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾))))
36	35	rspcev 2834	. . . . . . 7 ⊢ ((𝑚 ∈ ℤ ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
37	29, 30, 31, 36	syl12anc 1231	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
38		breq1 3992	. . . . . . . 8 ⊢ (𝑛 = (𝑚 + 𝐾) → (𝑛 ≤ 𝐴 ↔ (𝑚 + 𝐾) ≤ 𝐴))
39		breq2 3993	. . . . . . . 8 ⊢ (𝑛 = (𝑚 + 𝐾) → (𝐴 < 𝑛 ↔ 𝐴 < (𝑚 + 𝐾)))
40	38, 39	orbi12d 788	. . . . . . 7 ⊢ (𝑛 = (𝑚 + 𝐾) → ((𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛) ↔ ((𝑚 + 𝐾) ≤ 𝐴 ∨ 𝐴 < (𝑚 + 𝐾))))
41		exbtwnzlemstep.tri	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑛 ∈ ℤ) → (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))
42	41	ralrimiva 2543	. . . . . . . 8 ⊢ (𝜑 → ∀𝑛 ∈ ℤ (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))
43	42	ad2antrr 485	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∀𝑛 ∈ ℤ (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))
44		simplr 525	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝑚 ∈ ℤ)
45	2	ad2antrr 485	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝐾 ∈ ℕ)
46	45	nnzd 9333	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝐾 ∈ ℤ)
47	44, 46	zaddcld 9338	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → (𝑚 + 𝐾) ∈ ℤ)
48	40, 43, 47	rspcdva 2839	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ((𝑚 + 𝐾) ≤ 𝐴 ∨ 𝐴 < (𝑚 + 𝐾)))
49	28, 37, 48	mpjaodan 793	. . . . 5 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
50	49	ex 114	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → ((𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
51	50	rexlimdva 2587	. . 3 ⊢ (𝜑 → (∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
52	51	imp 123	. 2 ⊢ ((𝜑 ∧ ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
53		breq1 3992	. . . 4 ⊢ (𝑚 = 𝑗 → (𝑚 ≤ 𝐴 ↔ 𝑗 ≤ 𝐴))
54		oveq1 5860	. . . . 5 ⊢ (𝑚 = 𝑗 → (𝑚 + 𝐾) = (𝑗 + 𝐾))
55	54	breq2d 4001	. . . 4 ⊢ (𝑚 = 𝑗 → (𝐴 < (𝑚 + 𝐾) ↔ 𝐴 < (𝑗 + 𝐾)))
56	53, 55	anbi12d 470	. . 3 ⊢ (𝑚 = 𝑗 → ((𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)) ↔ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
57	56	cbvrexv 2697	. 2 ⊢ (∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)) ↔ ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
58	52, 57	sylibr 133	1 ⊢ ((𝜑 ∧ ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)))

Syntax hints:   → wi 4   ∧ wa 103   ∨ wo 703   = wceq 1348   ∈ wcel 2141  ∀wral 2448  ∃wrex 2449   class class class wbr 3989  (class class class)co 5853  ℝcr 7773  1c1 7775   + caddc 7777   < clt 7954   ≤ cle 7955  ℕcn 8878  ℤcz 9212

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-addcom 7874  ax-addass 7876  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-0id 7882  ax-rnegex 7883  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-ltadd 7890

This theorem depends on definitions:  df-bi 116  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-br 3990  df-opab 4051  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-iota 5160  df-fun 5200  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-inn 8879  df-n0 9136  df-z 9213

This theorem is referenced by:  exbtwnzlemshrink  10205