Theorem caucvgrelemcau 10944

Description: Lemma for caucvgre 10945. Converting the Cauchy condition. (Contributed by Jim Kingdon, 20-Jul-2021.)

Hypotheses

Ref	Expression
caucvgre.f	⊢ (𝜑 → 𝐹:ℕ⟶ℝ)
caucvgre.cau	⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))))

Assertion

Ref	Expression
caucvgrelemcau	⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ ℕ (𝑛 <ℝ 𝑘 → ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ∧ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)))))

Distinct variable groups:   𝑘,𝐹,𝑛   𝜑,𝑘,𝑛   𝑘,𝑟,𝑛

Allowed substitution hints:   𝜑(𝑟)   𝐹(𝑟)

Proof of Theorem caucvgrelemcau

Step	Hyp	Ref	Expression
1		simplr 525	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝑛 ∈ ℕ)
2	1	nnred 8891	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝑛 ∈ ℝ)
3		simpr 109	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
4	3	nnred 8891	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℝ)
5		ltle 8007	. . . . . 6 ⊢ ((𝑛 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (𝑛 < 𝑘 → 𝑛 ≤ 𝑘))
6	2, 4, 5	syl2anc 409	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝑛 < 𝑘 → 𝑛 ≤ 𝑘))
7		eluznn 9559	. . . . . . . . . . . 12 ⊢ ((𝑛 ∈ ℕ ∧ 𝑘 ∈ (ℤ≥‘𝑛)) → 𝑘 ∈ ℕ)
8	7	ex 114	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → (𝑘 ∈ (ℤ≥‘𝑛) → 𝑘 ∈ ℕ))
9		nnz 9231	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℤ)
10		eluz1 9491	. . . . . . . . . . . . 13 ⊢ (𝑛 ∈ ℤ → (𝑘 ∈ (ℤ≥‘𝑛) ↔ (𝑘 ∈ ℤ ∧ 𝑛 ≤ 𝑘)))
11	9, 10	syl 14	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ → (𝑘 ∈ (ℤ≥‘𝑛) ↔ (𝑘 ∈ ℤ ∧ 𝑛 ≤ 𝑘)))
12		simpr 109	. . . . . . . . . . . 12 ⊢ ((𝑘 ∈ ℤ ∧ 𝑛 ≤ 𝑘) → 𝑛 ≤ 𝑘)
13	11, 12	syl6bi 162	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → (𝑘 ∈ (ℤ≥‘𝑛) → 𝑛 ≤ 𝑘))
14	8, 13	jcad 305	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ → (𝑘 ∈ (ℤ≥‘𝑛) → (𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘)))
15		nnz 9231	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℤ)
16	15	anim1i 338	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘) → (𝑘 ∈ ℤ ∧ 𝑛 ≤ 𝑘))
17	16, 11	syl5ibr 155	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ → ((𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘) → 𝑘 ∈ (ℤ≥‘𝑛)))
18	14, 17	impbid 128	. . . . . . . . 9 ⊢ (𝑛 ∈ ℕ → (𝑘 ∈ (ℤ≥‘𝑛) ↔ (𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘)))
19	18	adantl 275	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑘 ∈ (ℤ≥‘𝑛) ↔ (𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘)))
20	19	biimpar 295	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘)) → 𝑘 ∈ (ℤ≥‘𝑛))
21		caucvgre.cau	. . . . . . . . 9 ⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ (ℤ≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))))
22	21	r19.21bi 2558	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ∀𝑘 ∈ (ℤ≥‘𝑛)((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))))
23	22	r19.21bi 2558	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ℤ≥‘𝑛)) → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))))
24	20, 23	syldan 280	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ (𝑘 ∈ ℕ ∧ 𝑛 ≤ 𝑘)) → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))))
25	24	expr 373	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝑛 ≤ 𝑘 → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛)))))
26	6, 25	syld 45	. . . 4 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝑛 < 𝑘 → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛)))))
27		ltxrlt 7985	. . . . 5 ⊢ ((𝑛 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (𝑛 < 𝑘 ↔ 𝑛 <ℝ 𝑘))
28	2, 4, 27	syl2anc 409	. . . 4 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝑛 < 𝑘 ↔ 𝑛 <ℝ 𝑘))
29		caucvgre.f	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:ℕ⟶ℝ)
30	29	ad2antrr 485	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝐹:ℕ⟶ℝ)
31	30, 1	ffvelrnd 5632	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝐹‘𝑛) ∈ ℝ)
32	30, 3	ffvelrnd 5632	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝐹‘𝑘) ∈ ℝ)
33	1	nnrecred 8925	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (1 / 𝑛) ∈ ℝ)
34	32, 33	readdcld 7949	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑘) + (1 / 𝑛)) ∈ ℝ)
35		ltxrlt 7985	. . . . . . 7 ⊢ (((𝐹‘𝑛) ∈ ℝ ∧ ((𝐹‘𝑘) + (1 / 𝑛)) ∈ ℝ) → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ↔ (𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (1 / 𝑛))))
36	31, 34, 35	syl2anc 409	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ↔ (𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (1 / 𝑛))))
37		nnap0 8907	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ → 𝑛 # 0)
38	1, 37	syl 14	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → 𝑛 # 0)
39		caucvgrelemrec 10943	. . . . . . . . 9 ⊢ ((𝑛 ∈ ℝ ∧ 𝑛 # 0) → (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1) = (1 / 𝑛))
40	2, 38, 39	syl2anc 409	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1) = (1 / 𝑛))
41	40	oveq2d 5869	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) = ((𝐹‘𝑘) + (1 / 𝑛)))
42	41	breq2d 4001	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ↔ (𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (1 / 𝑛))))
43	36, 42	bitr4d 190	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ↔ (𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1))))
44	31, 33	readdcld 7949	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑛) + (1 / 𝑛)) ∈ ℝ)
45		ltxrlt 7985	. . . . . . 7 ⊢ (((𝐹‘𝑘) ∈ ℝ ∧ ((𝐹‘𝑛) + (1 / 𝑛)) ∈ ℝ) → ((𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛)) ↔ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (1 / 𝑛))))
46	32, 44, 45	syl2anc 409	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛)) ↔ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (1 / 𝑛))))
47	40	oveq2d 5869	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) = ((𝐹‘𝑛) + (1 / 𝑛)))
48	47	breq2d 4001	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ↔ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (1 / 𝑛))))
49	46, 48	bitr4d 190	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛)) ↔ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1))))
50	43, 49	anbi12d 470	. . . 4 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (((𝐹‘𝑛) < ((𝐹‘𝑘) + (1 / 𝑛)) ∧ (𝐹‘𝑘) < ((𝐹‘𝑛) + (1 / 𝑛))) ↔ ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ∧ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)))))
51	26, 28, 50	3imtr3d 201	. . 3 ⊢ (((𝜑 ∧ 𝑛 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (𝑛 <ℝ 𝑘 → ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ∧ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)))))
52	51	ralrimiva 2543	. 2 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → ∀𝑘 ∈ ℕ (𝑛 <ℝ 𝑘 → ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ∧ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)))))
53	52	ralrimiva 2543	1 ⊢ (𝜑 → ∀𝑛 ∈ ℕ ∀𝑘 ∈ ℕ (𝑛 <ℝ 𝑘 → ((𝐹‘𝑛) <ℝ ((𝐹‘𝑘) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)) ∧ (𝐹‘𝑘) <ℝ ((𝐹‘𝑛) + (℩𝑟 ∈ ℝ (𝑛 · 𝑟) = 1)))))

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1348   ∈ wcel 2141  ∀wral 2448   class class class wbr 3989  ⟶wf 5194  ‘cfv 5198  ℩crio 5808  (class class class)co 5853  ℝcr 7773  0cc0 7774  1c1 7775   + caddc 7777   <_ℝ cltrr 7778   · cmul 7779   < clt 7954   ≤ cle 7955   # cap 8500   / cdiv 8589  ℕcn 8878  ℤcz 9212  ℤ_≥cuz 9487

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-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891  ax-pre-mulext 7892

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-rmo 2456  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-mpt 4052  df-id 4278  df-po 4281  df-iso 4282  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  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-reap 8494  df-ap 8501  df-div 8590  df-inn 8879  df-z 9213  df-uz 9488

This theorem is referenced by:  caucvgre  10945