Theorem exbtwnzlemstep 10462

Description: Lemma for exbtwnzlemex 10464. 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 534	. . . . . . . 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 492	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℕ)
4	3	nnzd 9564	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℤ)
5	1, 4	zaddcld 9569	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → (𝑚 + 𝐾) ∈ ℤ)
6		simpr 110	. . . . . . 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 492	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 ∈ ℝ)
9	5	zred 9565	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → (𝑚 + 𝐾) ∈ ℝ)
10		1red 8157	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ∈ ℝ)
11	9, 10	readdcld 8172	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 1) ∈ ℝ)
12	3	nnred 9119	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℝ)
13	9, 12	readdcld 8172	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 𝐾) ∈ ℝ)
14		simplrr 536	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < (𝑚 + (𝐾 + 1)))
15	1	zcnd 9566	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝑚 ∈ ℂ)
16	3	nncnd 9120	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐾 ∈ ℂ)
17		1cnd 8158	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ∈ ℂ)
18	15, 16, 17	addassd 8165	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ((𝑚 + 𝐾) + 1) = (𝑚 + (𝐾 + 1)))
19	14, 18	breqtrrd 4110	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < ((𝑚 + 𝐾) + 1))
20	3	nnge1d 9149	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 1 ≤ 𝐾)
21	10, 12, 9, 20	leadd2dd 8703	. . . . . . . 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 8566	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → 𝐴 < ((𝑚 + 𝐾) + 𝐾))
23		breq1 4085	. . . . . . . . 9 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝑗 ≤ 𝐴 ↔ (𝑚 + 𝐾) ≤ 𝐴))
24		oveq1 6007	. . . . . . . . . 10 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝑗 + 𝐾) = ((𝑚 + 𝐾) + 𝐾))
25	24	breq2d 4094	. . . . . . . . 9 ⊢ (𝑗 = (𝑚 + 𝐾) → (𝐴 < (𝑗 + 𝐾) ↔ 𝐴 < ((𝑚 + 𝐾) + 𝐾)))
26	23, 25	anbi12d 473	. . . . . . . 8 ⊢ (𝑗 = (𝑚 + 𝐾) → ((𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)) ↔ ((𝑚 + 𝐾) ≤ 𝐴 ∧ 𝐴 < ((𝑚 + 𝐾) + 𝐾))))
27	26	rspcev 2907	. . . . . . 7 ⊢ (((𝑚 + 𝐾) ∈ ℤ ∧ ((𝑚 + 𝐾) ≤ 𝐴 ∧ 𝐴 < ((𝑚 + 𝐾) + 𝐾))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
28	5, 6, 22, 27	syl12anc 1269	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ (𝑚 + 𝐾) ≤ 𝐴) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
29		simpllr 534	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝑚 ∈ ℤ)
30		simplrl 535	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝑚 ≤ 𝐴)
31		simpr 110	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → 𝐴 < (𝑚 + 𝐾))
32		breq1 4085	. . . . . . . . 9 ⊢ (𝑗 = 𝑚 → (𝑗 ≤ 𝐴 ↔ 𝑚 ≤ 𝐴))
33		oveq1 6007	. . . . . . . . . 10 ⊢ (𝑗 = 𝑚 → (𝑗 + 𝐾) = (𝑚 + 𝐾))
34	33	breq2d 4094	. . . . . . . . 9 ⊢ (𝑗 = 𝑚 → (𝐴 < (𝑗 + 𝐾) ↔ 𝐴 < (𝑚 + 𝐾)))
35	32, 34	anbi12d 473	. . . . . . . 8 ⊢ (𝑗 = 𝑚 → ((𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)) ↔ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾))))
36	35	rspcev 2907	. . . . . . 7 ⊢ ((𝑚 ∈ ℤ ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
37	29, 30, 31, 36	syl12anc 1269	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) ∧ 𝐴 < (𝑚 + 𝐾)) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
38		breq1 4085	. . . . . . . 8 ⊢ (𝑛 = (𝑚 + 𝐾) → (𝑛 ≤ 𝐴 ↔ (𝑚 + 𝐾) ≤ 𝐴))
39		breq2 4086	. . . . . . . 8 ⊢ (𝑛 = (𝑚 + 𝐾) → (𝐴 < 𝑛 ↔ 𝐴 < (𝑚 + 𝐾)))
40	38, 39	orbi12d 798	. . . . . . 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 2603	. . . . . . . 8 ⊢ (𝜑 → ∀𝑛 ∈ ℤ (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))
43	42	ad2antrr 488	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∀𝑛 ∈ ℤ (𝑛 ≤ 𝐴 ∨ 𝐴 < 𝑛))
44		simplr 528	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝑚 ∈ ℤ)
45	2	ad2antrr 488	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝐾 ∈ ℕ)
46	45	nnzd 9564	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → 𝐾 ∈ ℤ)
47	44, 46	zaddcld 9569	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → (𝑚 + 𝐾) ∈ ℤ)
48	40, 43, 47	rspcdva 2912	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ((𝑚 + 𝐾) ≤ 𝐴 ∨ 𝐴 < (𝑚 + 𝐾)))
49	28, 37, 48	mpjaodan 803	. . . . 5 ⊢ (((𝜑 ∧ 𝑚 ∈ ℤ) ∧ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
50	49	ex 115	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ ℤ) → ((𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
51	50	rexlimdva 2648	. . 3 ⊢ (𝜑 → (∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
52	51	imp 124	. 2 ⊢ ((𝜑 ∧ ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
53		breq1 4085	. . . 4 ⊢ (𝑚 = 𝑗 → (𝑚 ≤ 𝐴 ↔ 𝑗 ≤ 𝐴))
54		oveq1 6007	. . . . 5 ⊢ (𝑚 = 𝑗 → (𝑚 + 𝐾) = (𝑗 + 𝐾))
55	54	breq2d 4094	. . . 4 ⊢ (𝑚 = 𝑗 → (𝐴 < (𝑚 + 𝐾) ↔ 𝐴 < (𝑗 + 𝐾)))
56	53, 55	anbi12d 473	. . 3 ⊢ (𝑚 = 𝑗 → ((𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)) ↔ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾))))
57	56	cbvrexv 2766	. 2 ⊢ (∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)) ↔ ∃𝑗 ∈ ℤ (𝑗 ≤ 𝐴 ∧ 𝐴 < (𝑗 + 𝐾)))
58	52, 57	sylibr 134	1 ⊢ ((𝜑 ∧ ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + (𝐾 + 1)))) → ∃𝑚 ∈ ℤ (𝑚 ≤ 𝐴 ∧ 𝐴 < (𝑚 + 𝐾)))

Syntax hints:   → wi 4   ∧ wa 104   ∨ wo 713   = wceq 1395   ∈ wcel 2200  ∀wral 2508  ∃wrex 2509   class class class wbr 4082  (class class class)co 6000  ℝcr 7994  1c1 7996   + caddc 7998   < clt 8177   ≤ cle 8178  ℕcn 9106  ℤcz 9442

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-setind 4628  ax-cnex 8086  ax-resscn 8087  ax-1cn 8088  ax-1re 8089  ax-icn 8090  ax-addcl 8091  ax-addrcl 8092  ax-mulcl 8093  ax-addcom 8095  ax-addass 8097  ax-distr 8099  ax-i2m1 8100  ax-0lt1 8101  ax-0id 8103  ax-rnegex 8104  ax-cnre 8106  ax-pre-ltirr 8107  ax-pre-ltwlin 8108  ax-pre-lttrn 8109  ax-pre-ltadd 8111

This theorem depends on definitions:  df-bi 117  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-opab 4145  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-iota 5277  df-fun 5319  df-fv 5325  df-riota 5953  df-ov 6003  df-oprab 6004  df-mpo 6005  df-pnf 8179  df-mnf 8180  df-xr 8181  df-ltxr 8182  df-le 8183  df-sub 8315  df-neg 8316  df-inn 9107  df-n0 9366  df-z 9443

This theorem is referenced by:  exbtwnzlemshrink  10463