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Theorem dvgt0lem1 26041

Description: Lemma for dvgt0 26043 and dvlt0 26044. (Contributed by Mario Carneiro, 19-Feb-2015.)

**Hypotheses**
Ref	Expression
dvgt0.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
dvgt0.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
dvgt0.f	⊢ (𝜑 → 𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
dvgt0lem.d	⊢ (𝜑 → (ℝ D 𝐹):(𝐴(,)𝐵)⟶𝑆)

**Assertion**
Ref	Expression
dvgt0lem1	⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (((𝐹‘𝑌) − (𝐹‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆)

Proof of Theorem dvgt0lem1 Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		iccssxr 13470	. . . . . . 7 ⊢ (𝐴[,]𝐵) ⊆ ℝ^*
2		simplrl 777	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 ∈ (𝐴[,]𝐵))
3	1, 2	sselid 3981	. . . . . 6 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 ∈ ℝ^*)
4		simplrr 778	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑌 ∈ (𝐴[,]𝐵))
5	1, 4	sselid 3981	. . . . . 6 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑌 ∈ ℝ^*)
6		dvgt0.a	. . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ∈ ℝ)
7		dvgt0.b	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵 ∈ ℝ)
8		iccssre 13469	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
9	6, 7, 8	syl2anc 584	. . . . . . . . 9 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
10	9	ad2antrr 726	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝐴[,]𝐵) ⊆ ℝ)
11	10, 2	sseldd 3984	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 ∈ ℝ)
12	10, 4	sseldd 3984	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑌 ∈ ℝ)
13		simpr 484	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 < 𝑌)
14	11, 12, 13	ltled 11409	. . . . . 6 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 ≤ 𝑌)
15		ubicc2 13505	. . . . . 6 ⊢ ((𝑋 ∈ ℝ^* ∧ 𝑌 ∈ ℝ^* ∧ 𝑋 ≤ 𝑌) → 𝑌 ∈ (𝑋[,]𝑌))
16	3, 5, 14, 15	syl3anc 1373	. . . . 5 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑌 ∈ (𝑋[,]𝑌))
17	16	fvresd 6926	. . . 4 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) = (𝐹‘𝑌))
18		lbicc2 13504	. . . . . 6 ⊢ ((𝑋 ∈ ℝ^* ∧ 𝑌 ∈ ℝ^* ∧ 𝑋 ≤ 𝑌) → 𝑋 ∈ (𝑋[,]𝑌))
19	3, 5, 14, 18	syl3anc 1373	. . . . 5 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑋 ∈ (𝑋[,]𝑌))
20	19	fvresd 6926	. . . 4 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋) = (𝐹‘𝑋))
21	17, 20	oveq12d 7449	. . 3 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) = ((𝐹‘𝑌) − (𝐹‘𝑋)))
22	21	oveq1d 7446	. 2 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) = (((𝐹‘𝑌) − (𝐹‘𝑋)) / (𝑌 − 𝑋)))
23		iccss2 13458	. . . . . 6 ⊢ ((𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵)) → (𝑋[,]𝑌) ⊆ (𝐴[,]𝐵))
24	23	ad2antlr 727	. . . . 5 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋[,]𝑌) ⊆ (𝐴[,]𝐵))
25		dvgt0.f	. . . . . 6 ⊢ (𝜑 → 𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
26	25	ad2antrr 726	. . . . 5 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ))
27		rescncf 24923	. . . . 5 ⊢ ((𝑋[,]𝑌) ⊆ (𝐴[,]𝐵) → (𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ) → (𝐹 ↾ (𝑋[,]𝑌)) ∈ ((𝑋[,]𝑌)–cn→ℝ)))
28	24, 26, 27	sylc 65	. . . 4 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝐹 ↾ (𝑋[,]𝑌)) ∈ ((𝑋[,]𝑌)–cn→ℝ))
29		dvgt0lem.d	. . . . . . . 8 ⊢ (𝜑 → (ℝ D 𝐹):(𝐴(,)𝐵)⟶𝑆)
30	29	ad2antrr 726	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (ℝ D 𝐹):(𝐴(,)𝐵)⟶𝑆)
31	6	ad2antrr 726	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐴 ∈ ℝ)
32	31	rexrd 11311	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐴 ∈ ℝ^*)
33	7	ad2antrr 726	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐵 ∈ ℝ)
34		elicc2 13452	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
35	31, 33, 34	syl2anc 584	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
36	2, 35	mpbid 232	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵))
37	36	simp2d 1144	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐴 ≤ 𝑋)
38		iooss1 13422	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑋) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
39	32, 37, 38	syl2anc 584	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
40	33	rexrd 11311	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐵 ∈ ℝ^*)
41		elicc2 13452	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
42	31, 33, 41	syl2anc 584	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
43	4, 42	mpbid 232	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵))
44	43	simp3d 1145	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝑌 ≤ 𝐵)
45		iooss2 13423	. . . . . . . . 9 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑌 ≤ 𝐵) → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
46	40, 44, 45	syl2anc 584	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
47	39, 46	sstrd 3994	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝐵))
48	30, 47	fssresd 6775	. . . . . 6 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((ℝ D 𝐹) ↾ (𝑋(,)𝑌)):(𝑋(,)𝑌)⟶𝑆)
49		ax-resscn 11212	. . . . . . . . . 10 ⊢ ℝ ⊆ ℂ
50	49	a1i 11	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ℝ ⊆ ℂ)
51		cncff 24919	. . . . . . . . . . . 12 ⊢ (𝐹 ∈ ((𝐴[,]𝐵)–cn→ℝ) → 𝐹:(𝐴[,]𝐵)⟶ℝ)
52	25, 51	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹:(𝐴[,]𝐵)⟶ℝ)
53	52	ad2antrr 726	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐹:(𝐴[,]𝐵)⟶ℝ)
54		fss 6752	. . . . . . . . . 10 ⊢ ((𝐹:(𝐴[,]𝐵)⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐹:(𝐴[,]𝐵)⟶ℂ)
55	53, 49, 54	sylancl 586	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → 𝐹:(𝐴[,]𝐵)⟶ℂ)
56		iccssre 13469	. . . . . . . . . 10 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋[,]𝑌) ⊆ ℝ)
57	11, 12, 56	syl2anc 584	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (𝑋[,]𝑌) ⊆ ℝ)
58		eqid 2737	. . . . . . . . . 10 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
59		tgioo4 24826	. . . . . . . . . 10 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
60	58, 59	dvres 25946	. . . . . . . . 9 ⊢ (((ℝ ⊆ ℂ ∧ 𝐹:(𝐴[,]𝐵)⟶ℂ) ∧ ((𝐴[,]𝐵) ⊆ ℝ ∧ (𝑋[,]𝑌) ⊆ ℝ)) → (ℝ D (𝐹 ↾ (𝑋[,]𝑌))) = ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘(𝑋[,]𝑌))))
61	50, 55, 10, 57, 60	syl22anc 839	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (ℝ D (𝐹 ↾ (𝑋[,]𝑌))) = ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘(𝑋[,]𝑌))))
62		iccntr 24843	. . . . . . . . . 10 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝑋[,]𝑌)) = (𝑋(,)𝑌))
63	11, 12, 62	syl2anc 584	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((int‘(topGen‘ran (,)))‘(𝑋[,]𝑌)) = (𝑋(,)𝑌))
64	63	reseq2d 5997	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((ℝ D 𝐹) ↾ ((int‘(topGen‘ran (,)))‘(𝑋[,]𝑌))) = ((ℝ D 𝐹) ↾ (𝑋(,)𝑌)))
65	61, 64	eqtrd 2777	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (ℝ D (𝐹 ↾ (𝑋[,]𝑌))) = ((ℝ D 𝐹) ↾ (𝑋(,)𝑌)))
66	65	feq1d 6720	. . . . . 6 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((ℝ D (𝐹 ↾ (𝑋[,]𝑌))):(𝑋(,)𝑌)⟶𝑆 ↔ ((ℝ D 𝐹) ↾ (𝑋(,)𝑌)):(𝑋(,)𝑌)⟶𝑆))
67	48, 66	mpbird 257	. . . . 5 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (ℝ D (𝐹 ↾ (𝑋[,]𝑌))):(𝑋(,)𝑌)⟶𝑆)
68	67	fdmd 6746	. . . 4 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → dom (ℝ D (𝐹 ↾ (𝑋[,]𝑌))) = (𝑋(,)𝑌))
69	11, 12, 13, 28, 68	mvth 26031	. . 3 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ∃𝑧 ∈ (𝑋(,)𝑌)((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) = ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)))
70	67	ffvelcdmda 7104	. . . . 5 ⊢ ((((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) ∧ 𝑧 ∈ (𝑋(,)𝑌)) → ((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) ∈ 𝑆)
71		eleq1 2829	. . . . 5 ⊢ (((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) = ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) → (((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) ∈ 𝑆 ↔ ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆))
72	70, 71	syl5ibcom 245	. . . 4 ⊢ ((((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) ∧ 𝑧 ∈ (𝑋(,)𝑌)) → (((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) = ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) → ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆))
73	72	rexlimdva 3155	. . 3 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (∃𝑧 ∈ (𝑋(,)𝑌)((ℝ D (𝐹 ↾ (𝑋[,]𝑌)))‘𝑧) = ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) → ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆))
74	69, 73	mpd 15	. 2 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → ((((𝐹 ↾ (𝑋[,]𝑌))‘𝑌) − ((𝐹 ↾ (𝑋[,]𝑌))‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆)
75	22, 74	eqeltrrd 2842	1 ⊢ (((𝜑 ∧ (𝑋 ∈ (𝐴[,]𝐵) ∧ 𝑌 ∈ (𝐴[,]𝐵))) ∧ 𝑋 < 𝑌) → (((𝐹‘𝑌) − (𝐹‘𝑋)) / (𝑌 − 𝑋)) ∈ 𝑆)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1540 ∈ wcel 2108 ∃wrex 3070 ⊆ wss 3951 class class class wbr 5143 ran crn 5686 ↾ cres 5687 ⟶wf 6557 ‘cfv 6561 (class class class)co 7431 ℂcc 11153 ℝcr 11154 ℝ^*cxr 11294 < clt 11295 ≤ cle 11296 − cmin 11492 / cdiv 11920 (,)cioo 13387 [,]cicc 13390 TopOpenctopn 17466 topGenctg 17482 ℂ_fldccnfld 21364 intcnt 23025 –cn→ccncf 24902 D cdv 25898

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233 ax-addf 11234

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-iin 4994 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-se 5638 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-isom 6570 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-of 7697 df-om 7888 df-1st 8014 df-2nd 8015 df-supp 8186 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-2o 8507 df-er 8745 df-map 8868 df-pm 8869 df-ixp 8938 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-fsupp 9402 df-fi 9451 df-sup 9482 df-inf 9483 df-oi 9550 df-card 9979 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12614 df-dec 12734 df-uz 12879 df-q 12991 df-rp 13035 df-xneg 13154 df-xadd 13155 df-xmul 13156 df-ioo 13391 df-ico 13393 df-icc 13394 df-fz 13548 df-fzo 13695 df-seq 14043 df-exp 14103 df-hash 14370 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 df-struct 17184 df-sets 17201 df-slot 17219 df-ndx 17231 df-base 17248 df-ress 17275 df-plusg 17310 df-mulr 17311 df-starv 17312 df-sca 17313 df-vsca 17314 df-ip 17315 df-tset 17316 df-ple 17317 df-ds 17319 df-unif 17320 df-hom 17321 df-cco 17322 df-rest 17467 df-topn 17468 df-0g 17486 df-gsum 17487 df-topgen 17488 df-pt 17489 df-prds 17492 df-xrs 17547 df-qtop 17552 df-imas 17553 df-xps 17555 df-mre 17629 df-mrc 17630 df-acs 17632 df-mgm 18653 df-sgrp 18732 df-mnd 18748 df-submnd 18797 df-mulg 19086 df-cntz 19335 df-cmn 19800 df-psmet 21356 df-xmet 21357 df-met 21358 df-bl 21359 df-mopn 21360 df-fbas 21361 df-fg 21362 df-cnfld 21365 df-top 22900 df-topon 22917 df-topsp 22939 df-bases 22953 df-cld 23027 df-ntr 23028 df-cls 23029 df-nei 23106 df-lp 23144 df-perf 23145 df-cn 23235 df-cnp 23236 df-haus 23323 df-cmp 23395 df-tx 23570 df-hmeo 23763 df-fil 23854 df-fm 23946 df-flim 23947 df-flf 23948 df-xms 24330 df-ms 24331 df-tms 24332 df-cncf 24904 df-limc 25901 df-dv 25902

This theorem is referenced by: dvgt0 26043 dvlt0 26044 dvge0 26045

W3C validator