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Theorem supcvg 15802

Description: Extract a sequence 𝑓 in 𝑋 such that the image of the points in the bounded set 𝐴 converges to the supremum 𝑆 of the set. Similar to Equation 4 of [Kreyszig] p. 144. The proof uses countable choice ax-cc 10430. (Contributed by Mario Carneiro, 15-Feb-2013.) (Proof shortened by Mario Carneiro, 26-Apr-2014.)

**Hypotheses**
Ref	Expression
supcvg.1	⊢ 𝑋 ∈ V
supcvg.2	⊢ 𝑆 = sup(𝐴, ℝ, < )
supcvg.3	⊢ 𝑅 = (𝑛 ∈ ℕ ↦ (𝑆 − (1 / 𝑛)))
supcvg.4	⊢ (𝜑 → 𝑋 ≠ ∅)
supcvg.5	⊢ (𝜑 → 𝐹:𝑋–onto→𝐴)
supcvg.6	⊢ (𝜑 → 𝐴 ⊆ ℝ)
supcvg.7	⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥)

**Assertion**
Ref	Expression
supcvg	⊢ (𝜑 → ∃𝑓(𝑓:ℕ⟶𝑋 ∧ (𝐹 ∘ 𝑓) ⇝ 𝑆))

Distinct variable groups: 𝑥,𝑓,𝐹 𝑓,𝑛,𝜑 𝑅,𝑓,𝑥 𝑓,𝑋,𝑥 𝑥,𝑦,𝐴 𝑆,𝑛 Allowed substitution hints: 𝜑(𝑥,𝑦) 𝐴(𝑓,𝑛) 𝑅(𝑦,𝑛) 𝑆(𝑥,𝑦,𝑓) 𝐹(𝑦,𝑛) 𝑋(𝑦,𝑛)

Proof of Theorem supcvg Dummy variables 𝑘 𝑚 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq2 7417	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑘 → (1 / 𝑛) = (1 / 𝑘))
2	1	oveq2d 7425	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑘 → (𝑆 − (1 / 𝑛)) = (𝑆 − (1 / 𝑘)))
3		supcvg.3	. . . . . . . . . . 11 ⊢ 𝑅 = (𝑛 ∈ ℕ ↦ (𝑆 − (1 / 𝑛)))
4		ovex 7442	. . . . . . . . . . 11 ⊢ (𝑆 − (1 / 𝑘)) ∈ V
5	2, 3, 4	fvmpt 6999	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (𝑅‘𝑘) = (𝑆 − (1 / 𝑘)))
6	5	adantl 483	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑅‘𝑘) = (𝑆 − (1 / 𝑘)))
7		supcvg.2	. . . . . . . . . . 11 ⊢ 𝑆 = sup(𝐴, ℝ, < )
8		supcvg.6	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ⊆ ℝ)
9		supcvg.4	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑋 ≠ ∅)
10		supcvg.5	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐹:𝑋–onto→𝐴)
11		fof 6806	. . . . . . . . . . . . . . . . 17 ⊢ (𝐹:𝑋–onto→𝐴 → 𝐹:𝑋⟶𝐴)
12	10, 11	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐹:𝑋⟶𝐴)
13		feq3 6701	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 = ∅ → (𝐹:𝑋⟶𝐴 ↔ 𝐹:𝑋⟶∅))
14	12, 13	syl5ibcom 244	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝐴 = ∅ → 𝐹:𝑋⟶∅))
15		f00 6774	. . . . . . . . . . . . . . . 16 ⊢ (𝐹:𝑋⟶∅ ↔ (𝐹 = ∅ ∧ 𝑋 = ∅))
16	15	simprbi 498	. . . . . . . . . . . . . . 15 ⊢ (𝐹:𝑋⟶∅ → 𝑋 = ∅)
17	14, 16	syl6 35	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝐴 = ∅ → 𝑋 = ∅))
18	17	necon3d 2962	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋 ≠ ∅ → 𝐴 ≠ ∅))
19	9, 18	mpd 15	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ≠ ∅)
20		supcvg.7	. . . . . . . . . . . 12 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥)
21	8, 19, 20	suprcld 12177	. . . . . . . . . . 11 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ∈ ℝ)
22	7, 21	eqeltrid 2838	. . . . . . . . . 10 ⊢ (𝜑 → 𝑆 ∈ ℝ)
23		nnrp 12985	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℝ⁺)
24	23	rpreccld 13026	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (1 / 𝑘) ∈ ℝ⁺)
25		ltsubrp 13010	. . . . . . . . . 10 ⊢ ((𝑆 ∈ ℝ ∧ (1 / 𝑘) ∈ ℝ⁺) → (𝑆 − (1 / 𝑘)) < 𝑆)
26	22, 24, 25	syl2an 597	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑆 − (1 / 𝑘)) < 𝑆)
27	6, 26	eqbrtrd 5171	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑅‘𝑘) < 𝑆)
28	27, 7	breqtrdi 5190	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑅‘𝑘) < sup(𝐴, ℝ, < ))
29	8, 19, 20	3jca 1129	. . . . . . . 8 ⊢ (𝜑 → (𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥))
30		nnrecre 12254	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ → (1 / 𝑛) ∈ ℝ)
31		resubcl 11524	. . . . . . . . . . 11 ⊢ ((𝑆 ∈ ℝ ∧ (1 / 𝑛) ∈ ℝ) → (𝑆 − (1 / 𝑛)) ∈ ℝ)
32	22, 30, 31	syl2an 597	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑛 ∈ ℕ) → (𝑆 − (1 / 𝑛)) ∈ ℝ)
33	32, 3	fmptd 7114	. . . . . . . . 9 ⊢ (𝜑 → 𝑅:ℕ⟶ℝ)
34	33	ffvelcdmda 7087	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑅‘𝑘) ∈ ℝ)
35		suprlub 12178	. . . . . . . 8 ⊢ (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) ∧ (𝑅‘𝑘) ∈ ℝ) → ((𝑅‘𝑘) < sup(𝐴, ℝ, < ) ↔ ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) < 𝑧))
36	29, 34, 35	syl2an2r 684	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑅‘𝑘) < sup(𝐴, ℝ, < ) ↔ ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) < 𝑧))
37	28, 36	mpbid 231	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) < 𝑧)
38	8	adantr 482	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝐴 ⊆ ℝ)
39	38	sselda 3983	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ ℝ)
40		ltle 11302	. . . . . . . 8 ⊢ (((𝑅‘𝑘) ∈ ℝ ∧ 𝑧 ∈ ℝ) → ((𝑅‘𝑘) < 𝑧 → (𝑅‘𝑘) ≤ 𝑧))
41	34, 39, 40	syl2an2r 684	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ) ∧ 𝑧 ∈ 𝐴) → ((𝑅‘𝑘) < 𝑧 → (𝑅‘𝑘) ≤ 𝑧))
42	41	reximdva 3169	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (∃𝑧 ∈ 𝐴 (𝑅‘𝑘) < 𝑧 → ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) ≤ 𝑧))
43	37, 42	mpd 15	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) ≤ 𝑧)
44		forn 6809	. . . . . . . . 9 ⊢ (𝐹:𝑋–onto→𝐴 → ran 𝐹 = 𝐴)
45	10, 44	syl 17	. . . . . . . 8 ⊢ (𝜑 → ran 𝐹 = 𝐴)
46	45	rexeqdv 3327	. . . . . . 7 ⊢ (𝜑 → (∃𝑧 ∈ ran 𝐹(𝑅‘𝑘) ≤ 𝑧 ↔ ∃𝑧 ∈ 𝐴 (𝑅‘𝑘) ≤ 𝑧))
47		ffn 6718	. . . . . . . 8 ⊢ (𝐹:𝑋⟶𝐴 → 𝐹 Fn 𝑋)
48		breq2 5153	. . . . . . . . 9 ⊢ (𝑧 = (𝐹‘𝑥) → ((𝑅‘𝑘) ≤ 𝑧 ↔ (𝑅‘𝑘) ≤ (𝐹‘𝑥)))
49	48	rexrn 7089	. . . . . . . 8 ⊢ (𝐹 Fn 𝑋 → (∃𝑧 ∈ ran 𝐹(𝑅‘𝑘) ≤ 𝑧 ↔ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥)))
50	12, 47, 49	3syl 18	. . . . . . 7 ⊢ (𝜑 → (∃𝑧 ∈ ran 𝐹(𝑅‘𝑘) ≤ 𝑧 ↔ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥)))
51	46, 50	bitr3d 281	. . . . . 6 ⊢ (𝜑 → (∃𝑧 ∈ 𝐴 (𝑅‘𝑘) ≤ 𝑧 ↔ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥)))
52	51	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (∃𝑧 ∈ 𝐴 (𝑅‘𝑘) ≤ 𝑧 ↔ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥)))
53	43, 52	mpbid 231	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥))
54	53	ralrimiva 3147	. . 3 ⊢ (𝜑 → ∀𝑘 ∈ ℕ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥))
55		supcvg.1	. . . 4 ⊢ 𝑋 ∈ V
56		nnenom 13945	. . . 4 ⊢ ℕ ≈ ω
57		fveq2 6892	. . . . 5 ⊢ (𝑥 = (𝑓‘𝑘) → (𝐹‘𝑥) = (𝐹‘(𝑓‘𝑘)))
58	57	breq2d 5161	. . . 4 ⊢ (𝑥 = (𝑓‘𝑘) → ((𝑅‘𝑘) ≤ (𝐹‘𝑥) ↔ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))))
59	55, 56, 58	axcc4 10434	. . 3 ⊢ (∀𝑘 ∈ ℕ ∃𝑥 ∈ 𝑋 (𝑅‘𝑘) ≤ (𝐹‘𝑥) → ∃𝑓(𝑓:ℕ⟶𝑋 ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))))
60	54, 59	syl 17	. 2 ⊢ (𝜑 → ∃𝑓(𝑓:ℕ⟶𝑋 ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))))
61		nnuz 12865	. . . . . 6 ⊢ ℕ = (ℤ_≥‘1)
62		1zzd 12593	. . . . . 6 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 1 ∈ ℤ)
63		1zzd 12593	. . . . . . . . 9 ⊢ (𝜑 → 1 ∈ ℤ)
64	22	recnd 11242	. . . . . . . . . 10 ⊢ (𝜑 → 𝑆 ∈ ℂ)
65		1z 12592	. . . . . . . . . 10 ⊢ 1 ∈ ℤ
66	61	eqimss2i 4044	. . . . . . . . . . 11 ⊢ (ℤ_≥‘1) ⊆ ℕ
67		nnex 12218	. . . . . . . . . . 11 ⊢ ℕ ∈ V
68	66, 67	climconst2 15492	. . . . . . . . . 10 ⊢ ((𝑆 ∈ ℂ ∧ 1 ∈ ℤ) → (ℕ × {𝑆}) ⇝ 𝑆)
69	64, 65, 68	sylancl 587	. . . . . . . . 9 ⊢ (𝜑 → (ℕ × {𝑆}) ⇝ 𝑆)
70	67	mptex 7225	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ ↦ (𝑆 − (1 / 𝑛))) ∈ V
71	3, 70	eqeltri 2830	. . . . . . . . . 10 ⊢ 𝑅 ∈ V
72	71	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → 𝑅 ∈ V)
73		ax-1cn 11168	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
74		divcnv 15799	. . . . . . . . . 10 ⊢ (1 ∈ ℂ → (𝑛 ∈ ℕ ↦ (1 / 𝑛)) ⇝ 0)
75	73, 74	mp1i 13	. . . . . . . . 9 ⊢ (𝜑 → (𝑛 ∈ ℕ ↦ (1 / 𝑛)) ⇝ 0)
76		fvconst2g 7203	. . . . . . . . . . 11 ⊢ ((𝑆 ∈ ℝ ∧ 𝑘 ∈ ℕ) → ((ℕ × {𝑆})‘𝑘) = 𝑆)
77	22, 76	sylan 581	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((ℕ × {𝑆})‘𝑘) = 𝑆)
78	64	adantr 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → 𝑆 ∈ ℂ)
79	77, 78	eqeltrd 2834	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((ℕ × {𝑆})‘𝑘) ∈ ℂ)
80		eqid 2733	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ ℕ ↦ (1 / 𝑛)) = (𝑛 ∈ ℕ ↦ (1 / 𝑛))
81		ovex 7442	. . . . . . . . . . . 12 ⊢ (1 / 𝑘) ∈ V
82	1, 80, 81	fvmpt 6999	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (1 / 𝑛))‘𝑘) = (1 / 𝑘))
83	82	adantl 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (1 / 𝑛))‘𝑘) = (1 / 𝑘))
84		nnrecre 12254	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → (1 / 𝑘) ∈ ℝ)
85	84	recnd 11242	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → (1 / 𝑘) ∈ ℂ)
86	85	adantl 483	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (1 / 𝑘) ∈ ℂ)
87	83, 86	eqeltrd 2834	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (1 / 𝑛))‘𝑘) ∈ ℂ)
88	77, 83	oveq12d 7427	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (((ℕ × {𝑆})‘𝑘) − ((𝑛 ∈ ℕ ↦ (1 / 𝑛))‘𝑘)) = (𝑆 − (1 / 𝑘)))
89	6, 88	eqtr4d 2776	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ) → (𝑅‘𝑘) = (((ℕ × {𝑆})‘𝑘) − ((𝑛 ∈ ℕ ↦ (1 / 𝑛))‘𝑘)))
90	61, 63, 69, 72, 75, 79, 87, 89	climsub 15578	. . . . . . . 8 ⊢ (𝜑 → 𝑅 ⇝ (𝑆 − 0))
91	64	subid1d 11560	. . . . . . . 8 ⊢ (𝜑 → (𝑆 − 0) = 𝑆)
92	90, 91	breqtrd 5175	. . . . . . 7 ⊢ (𝜑 → 𝑅 ⇝ 𝑆)
93	92	ad2antrr 725	. . . . . 6 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 𝑅 ⇝ 𝑆)
94	12	ad2antrr 725	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 𝐹:𝑋⟶𝐴)
95		fex 7228	. . . . . . . 8 ⊢ ((𝐹:𝑋⟶𝐴 ∧ 𝑋 ∈ V) → 𝐹 ∈ V)
96	94, 55, 95	sylancl 587	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 𝐹 ∈ V)
97		vex 3479	. . . . . . 7 ⊢ 𝑓 ∈ V
98		coexg 7920	. . . . . . 7 ⊢ ((𝐹 ∈ V ∧ 𝑓 ∈ V) → (𝐹 ∘ 𝑓) ∈ V)
99	96, 97, 98	sylancl 587	. . . . . 6 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → (𝐹 ∘ 𝑓) ∈ V)
100	33	ad2antrr 725	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 𝑅:ℕ⟶ℝ)
101	100	ffvelcdmda 7087	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝑅‘𝑚) ∈ ℝ)
102	12, 8	fssd 6736	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:𝑋⟶ℝ)
103		fco 6742	. . . . . . . . 9 ⊢ ((𝐹:𝑋⟶ℝ ∧ 𝑓:ℕ⟶𝑋) → (𝐹 ∘ 𝑓):ℕ⟶ℝ)
104	102, 103	sylan 581	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑓:ℕ⟶𝑋) → (𝐹 ∘ 𝑓):ℕ⟶ℝ)
105	104	adantr 482	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → (𝐹 ∘ 𝑓):ℕ⟶ℝ)
106	105	ffvelcdmda 7087	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → ((𝐹 ∘ 𝑓)‘𝑚) ∈ ℝ)
107		fveq2 6892	. . . . . . . . . 10 ⊢ (𝑘 = 𝑚 → (𝑅‘𝑘) = (𝑅‘𝑚))
108		2fveq3 6897	. . . . . . . . . 10 ⊢ (𝑘 = 𝑚 → (𝐹‘(𝑓‘𝑘)) = (𝐹‘(𝑓‘𝑚)))
109	107, 108	breq12d 5162	. . . . . . . . 9 ⊢ (𝑘 = 𝑚 → ((𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘)) ↔ (𝑅‘𝑚) ≤ (𝐹‘(𝑓‘𝑚))))
110	109	rspccva 3612	. . . . . . . 8 ⊢ ((∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘)) ∧ 𝑚 ∈ ℕ) → (𝑅‘𝑚) ≤ (𝐹‘(𝑓‘𝑚)))
111	110	adantll 713	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝑅‘𝑚) ≤ (𝐹‘(𝑓‘𝑚)))
112		simplr 768	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → 𝑓:ℕ⟶𝑋)
113		fvco3 6991	. . . . . . . 8 ⊢ ((𝑓:ℕ⟶𝑋 ∧ 𝑚 ∈ ℕ) → ((𝐹 ∘ 𝑓)‘𝑚) = (𝐹‘(𝑓‘𝑚)))
114	112, 113	sylan 581	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → ((𝐹 ∘ 𝑓)‘𝑚) = (𝐹‘(𝑓‘𝑚)))
115	111, 114	breqtrrd 5177	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝑅‘𝑚) ≤ ((𝐹 ∘ 𝑓)‘𝑚))
116	29	ad3antrrr 729	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥))
117	112	ffvelcdmda 7087	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝑓‘𝑚) ∈ 𝑋)
118	94	ffvelcdmda 7087	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ (𝑓‘𝑚) ∈ 𝑋) → (𝐹‘(𝑓‘𝑚)) ∈ 𝐴)
119	117, 118	syldan 592	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝐹‘(𝑓‘𝑚)) ∈ 𝐴)
120		suprub 12175	. . . . . . . . 9 ⊢ (((𝐴 ⊆ ℝ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) ∧ (𝐹‘(𝑓‘𝑚)) ∈ 𝐴) → (𝐹‘(𝑓‘𝑚)) ≤ sup(𝐴, ℝ, < ))
121	116, 119, 120	syl2anc 585	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝐹‘(𝑓‘𝑚)) ≤ sup(𝐴, ℝ, < ))
122	121, 7	breqtrrdi 5191	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → (𝐹‘(𝑓‘𝑚)) ≤ 𝑆)
123	114, 122	eqbrtrd 5171	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) ∧ 𝑚 ∈ ℕ) → ((𝐹 ∘ 𝑓)‘𝑚) ≤ 𝑆)
124	61, 62, 93, 99, 101, 106, 115, 123	climsqz 15585	. . . . 5 ⊢ (((𝜑 ∧ 𝑓:ℕ⟶𝑋) ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → (𝐹 ∘ 𝑓) ⇝ 𝑆)
125	124	ex 414	. . . 4 ⊢ ((𝜑 ∧ 𝑓:ℕ⟶𝑋) → (∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘)) → (𝐹 ∘ 𝑓) ⇝ 𝑆))
126	125	imdistanda 573	. . 3 ⊢ (𝜑 → ((𝑓:ℕ⟶𝑋 ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → (𝑓:ℕ⟶𝑋 ∧ (𝐹 ∘ 𝑓) ⇝ 𝑆)))
127	126	eximdv 1921	. 2 ⊢ (𝜑 → (∃𝑓(𝑓:ℕ⟶𝑋 ∧ ∀𝑘 ∈ ℕ (𝑅‘𝑘) ≤ (𝐹‘(𝑓‘𝑘))) → ∃𝑓(𝑓:ℕ⟶𝑋 ∧ (𝐹 ∘ 𝑓) ⇝ 𝑆)))
128	60, 127	mpd 15	1 ⊢ (𝜑 → ∃𝑓(𝑓:ℕ⟶𝑋 ∧ (𝐹 ∘ 𝑓) ⇝ 𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∃wex 1782 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∃wrex 3071 Vcvv 3475 ⊆ wss 3949 ∅c0 4323 {csn 4629 class class class wbr 5149 ↦ cmpt 5232 × cxp 5675 ran crn 5678 ∘ ccom 5681 Fn wfn 6539 ⟶wf 6540 –onto→wfo 6542 ‘cfv 6544 (class class class)co 7409 supcsup 9435 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 < clt 11248 ≤ cle 11249 − cmin 11444 / cdiv 11871 ℕcn 12212 ℤcz 12558 ℤ_≥cuz 12822 ℝ⁺crp 12974 ⇝ cli 15428

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cc 10430 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-fl 13757 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-rlim 15433

This theorem is referenced by: (None)

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