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Theorem txmetcnp 24411

Description: Continuity of a binary operation on metric spaces. (Contributed by Mario Carneiro, 2-Sep-2015.)

**Hypotheses**
Ref	Expression
metcn.2	⊢ 𝐽 = (MetOpen‘𝐶)
metcn.4	⊢ 𝐾 = (MetOpen‘𝐷)
txmetcnp.4	⊢ 𝐿 = (MetOpen‘𝐸)

**Assertion**
Ref	Expression
txmetcnp	⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (𝐹 ∈ (((𝐽 ×_t 𝐾) CnP 𝐿)‘⟨𝐴, 𝐵⟩) ↔ (𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))))

Distinct variable groups: 𝑣,𝑢,𝑤,𝑧,𝐹 𝑢,𝐽,𝑣,𝑤,𝑧 𝑢,𝐾,𝑣,𝑤,𝑧 𝑢,𝑋,𝑣,𝑤,𝑧 𝑢,𝑌,𝑣,𝑤,𝑧 𝑢,𝑍,𝑣,𝑤,𝑧 𝑢,𝐴,𝑣,𝑤,𝑧 𝑢,𝐶,𝑣,𝑤,𝑧 𝑢,𝐷,𝑣,𝑤,𝑧 𝑢,𝐵,𝑣,𝑤,𝑧 𝑢,𝐸,𝑣,𝑤,𝑧 𝑤,𝐿,𝑧 Allowed substitution hints: 𝐿(𝑣,𝑢)

Proof of Theorem txmetcnp Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2726	. . . 4 ⊢ (dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷))) = (dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))
2		simpl1 1188	. . . 4 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐶 ∈ (∞Met‘𝑋))
3		simpl2 1189	. . . 4 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐷 ∈ (∞Met‘𝑌))
4	1, 2, 3	tmsxps 24400	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷))) ∈ (∞Met‘(𝑋 × 𝑌)))
5		simpl3 1190	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐸 ∈ (∞Met‘𝑍))
6		opelxpi 5706	. . . 4 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
7	6	adantl 481	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
8		eqid 2726	. . . 4 ⊢ (MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) = (MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷))))
9		txmetcnp.4	. . . 4 ⊢ 𝐿 = (MetOpen‘𝐸)
10	8, 9	metcnp 24405	. . 3 ⊢ (((dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷))) ∈ (∞Met‘(𝑋 × 𝑌)) ∧ 𝐸 ∈ (∞Met‘𝑍) ∧ ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌)) → (𝐹 ∈ (((MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) CnP 𝐿)‘⟨𝐴, 𝐵⟩) ↔ (𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧))))
11	4, 5, 7, 10	syl3anc 1368	. 2 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (𝐹 ∈ (((MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) CnP 𝐿)‘⟨𝐴, 𝐵⟩) ↔ (𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧))))
12		metcn.2	. . . . . 6 ⊢ 𝐽 = (MetOpen‘𝐶)
13		metcn.4	. . . . . 6 ⊢ 𝐾 = (MetOpen‘𝐷)
14	1, 2, 3, 12, 13, 8	tmsxpsmopn 24401	. . . . 5 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) = (𝐽 ×_t 𝐾))
15	14	oveq1d 7420	. . . 4 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → ((MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) CnP 𝐿) = ((𝐽 ×_t 𝐾) CnP 𝐿))
16	15	fveq1d 6887	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (((MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) CnP 𝐿)‘⟨𝐴, 𝐵⟩) = (((𝐽 ×_t 𝐾) CnP 𝐿)‘⟨𝐴, 𝐵⟩))
17	16	eleq2d 2813	. 2 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (𝐹 ∈ (((MetOpen‘(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))) CnP 𝐿)‘⟨𝐴, 𝐵⟩) ↔ 𝐹 ∈ (((𝐽 ×_t 𝐾) CnP 𝐿)‘⟨𝐴, 𝐵⟩)))
18		oveq2 7413	. . . . . . . . 9 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) = (⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩))
19	18	breq1d 5151	. . . . . . . 8 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 ↔ (⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤))
20		df-ov 7408	. . . . . . . . . . 11 ⊢ (𝐴𝐹𝐵) = (𝐹‘⟨𝐴, 𝐵⟩)
21	20	oveq1i 7415	. . . . . . . . . 10 ⊢ ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥))
22		fveq2 6885	. . . . . . . . . . . 12 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝐹‘⟨𝑢, 𝑣⟩))
23		df-ov 7408	. . . . . . . . . . . 12 ⊢ (𝑢𝐹𝑣) = (𝐹‘⟨𝑢, 𝑣⟩)
24	22, 23	eqtr4di 2784	. . . . . . . . . . 11 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝑢𝐹𝑣))
25	24	oveq2d 7421	. . . . . . . . . 10 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
26	21, 25	eqtr3id 2780	. . . . . . . . 9 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
27	26	breq1d 5151	. . . . . . . 8 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧 ↔ ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))
28	19, 27	imbi12d 344	. . . . . . 7 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧) ↔ ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
29	28	ralxp 5835	. . . . . 6 ⊢ (∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧) ↔ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))
30	2	ad2antrr 723	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝐶 ∈ (∞Met‘𝑋))
31	3	ad2antrr 723	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝐷 ∈ (∞Met‘𝑌))
32		simpllr 773	. . . . . . . . . . . . 13 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌))
33	32	simpld 494	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝐴 ∈ 𝑋)
34	32	simprd 495	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝐵 ∈ 𝑌)
35		simprrl 778	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝑢 ∈ 𝑋)
36		simprrr 779	. . . . . . . . . . . 12 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝑣 ∈ 𝑌)
37	1, 30, 31, 33, 34, 35, 36	tmsxpsval2 24403	. . . . . . . . . . 11 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) = if((𝐴𝐶𝑢) ≤ (𝐵𝐷𝑣), (𝐵𝐷𝑣), (𝐴𝐶𝑢)))
38	37	breq1d 5151	. . . . . . . . . 10 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 ↔ if((𝐴𝐶𝑢) ≤ (𝐵𝐷𝑣), (𝐵𝐷𝑣), (𝐴𝐶𝑢)) < 𝑤))
39		xmetcl 24192	. . . . . . . . . . . 12 ⊢ ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝑢 ∈ 𝑋) → (𝐴𝐶𝑢) ∈ ℝ^*)
40	30, 33, 35, 39	syl3anc 1368	. . . . . . . . . . 11 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (𝐴𝐶𝑢) ∈ ℝ^*)
41		xmetcl 24192	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (∞Met‘𝑌) ∧ 𝐵 ∈ 𝑌 ∧ 𝑣 ∈ 𝑌) → (𝐵𝐷𝑣) ∈ ℝ^*)
42	31, 34, 36, 41	syl3anc 1368	. . . . . . . . . . 11 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (𝐵𝐷𝑣) ∈ ℝ^*)
43		rpxr 12989	. . . . . . . . . . . 12 ⊢ (𝑤 ∈ ℝ⁺ → 𝑤 ∈ ℝ^*)
44	43	ad2antrl 725	. . . . . . . . . . 11 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → 𝑤 ∈ ℝ^*)
45		xrmaxlt 13166	. . . . . . . . . . 11 ⊢ (((𝐴𝐶𝑢) ∈ ℝ^* ∧ (𝐵𝐷𝑣) ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (if((𝐴𝐶𝑢) ≤ (𝐵𝐷𝑣), (𝐵𝐷𝑣), (𝐴𝐶𝑢)) < 𝑤 ↔ ((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤)))
46	40, 42, 44, 45	syl3anc 1368	. . . . . . . . . 10 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (if((𝐴𝐶𝑢) ≤ (𝐵𝐷𝑣), (𝐵𝐷𝑣), (𝐴𝐶𝑢)) < 𝑤 ↔ ((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤)))
47	38, 46	bitrd 279	. . . . . . . . 9 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 ↔ ((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤)))
48	47	imbi1d 341	. . . . . . . 8 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ (𝑤 ∈ ℝ⁺ ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌))) → (((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧) ↔ (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
49	48	anassrs 467	. . . . . . 7 ⊢ ((((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ 𝑤 ∈ ℝ⁺) ∧ (𝑢 ∈ 𝑋 ∧ 𝑣 ∈ 𝑌)) → (((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧) ↔ (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
50	49	2ralbidva 3210	. . . . . 6 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ 𝑤 ∈ ℝ⁺) → (∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 ((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))⟨𝑢, 𝑣⟩) < 𝑤 → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧) ↔ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
51	29, 50	bitrid 283	. . . . 5 ⊢ (((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) ∧ 𝑤 ∈ ℝ⁺) → (∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧) ↔ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
52	51	rexbidva 3170	. . . 4 ⊢ ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) → (∃𝑤 ∈ ℝ⁺ ∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧) ↔ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
53	52	ralbidv 3171	. . 3 ⊢ ((((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) ∧ 𝐹:(𝑋 × 𝑌)⟶𝑍) → (∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧) ↔ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧)))
54	53	pm5.32da 578	. 2 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → ((𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑥 ∈ (𝑋 × 𝑌)((⟨𝐴, 𝐵⟩(dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))𝑥) < 𝑤 → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧)) ↔ (𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))))
55	11, 17, 54	3bitr3d 309	1 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → (𝐹 ∈ (((𝐽 ×_t 𝐾) CnP 𝐿)‘⟨𝐴, 𝐵⟩) ↔ (𝐹:(𝑋 × 𝑌)⟶𝑍 ∧ ∀𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ 𝑋 ∀𝑣 ∈ 𝑌 (((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤) → ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ∀wral 3055 ∃wrex 3064 ifcif 4523 ⟨cop 4629 class class class wbr 5141 × cxp 5667 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ℝ^*cxr 11251 < clt 11252 ≤ cle 11253 ℝ⁺crp 12980 distcds 17215 ×_s cxps 17461 ∞Metcxmet 21225 MetOpencmopn 21230 CnP ccnp 23084 ×_t ctx 23419 toMetSpctms 24180

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7667 df-om 7853 df-1st 7974 df-2nd 7975 df-supp 8147 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-2o 8468 df-er 8705 df-map 8824 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12981 df-xneg 13098 df-xadd 13099 df-xmul 13100 df-icc 13337 df-fz 13491 df-fzo 13634 df-seq 13973 df-hash 14296 df-struct 17089 df-sets 17106 df-slot 17124 df-ndx 17136 df-base 17154 df-ress 17183 df-plusg 17219 df-mulr 17220 df-sca 17222 df-vsca 17223 df-ip 17224 df-tset 17225 df-ple 17226 df-ds 17228 df-hom 17230 df-cco 17231 df-rest 17377 df-topn 17378 df-0g 17396 df-gsum 17397 df-topgen 17398 df-pt 17399 df-prds 17402 df-xrs 17457 df-qtop 17462 df-imas 17463 df-xps 17465 df-mre 17539 df-mrc 17540 df-acs 17542 df-mgm 18573 df-sgrp 18652 df-mnd 18668 df-submnd 18714 df-mulg 18996 df-cntz 19233 df-cmn 19702 df-psmet 21232 df-xmet 21233 df-bl 21235 df-mopn 21236 df-top 22751 df-topon 22768 df-topsp 22790 df-bases 22804 df-cn 23086 df-cnp 23087 df-tx 23421 df-hmeo 23614 df-xms 24181 df-tms 24183

This theorem is referenced by: txmetcn 24412 cxpcn3 26638

W3C validator