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Theorem txmetcnp 24484

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 2728	. . . 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 24473	. . 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 5719	. . . 4 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
7	6	adantl 480	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
8		eqid 2728	. . . 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 24478	. . 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 24474	. . . . 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 7441	. . . 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 6904	. . 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 2815	. 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 7434	. . . . . . . . 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 5162	. . . . . . . 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 7429	. . . . . . . . . . 11 ⊢ (𝐴𝐹𝐵) = (𝐹‘⟨𝐴, 𝐵⟩)
21	20	oveq1i 7436	. . . . . . . . . 10 ⊢ ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥))
22		fveq2 6902	. . . . . . . . . . . 12 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝐹‘⟨𝑢, 𝑣⟩))
23		df-ov 7429	. . . . . . . . . . . 12 ⊢ (𝑢𝐹𝑣) = (𝐹‘⟨𝑢, 𝑣⟩)
24	22, 23	eqtr4di 2786	. . . . . . . . . . 11 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝑢𝐹𝑣))
25	24	oveq2d 7442	. . . . . . . . . 10 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
26	21, 25	eqtr3id 2782	. . . . . . . . 9 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
27	26	breq1d 5162	. . . . . . . 8 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) < 𝑧 ↔ ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)) < 𝑧))
28	19, 27	imbi12d 343	. . . . . . 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 5848	. . . . . 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 724	. . . . . . . . . . . 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 724	. . . . . . . . . . . 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 774	. . . . . . . . . . . . 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 493	. . . . . . . . . . . 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 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))) → 𝐵 ∈ 𝑌)
35		simprrl 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))) → 𝑢 ∈ 𝑋)
36		simprrr 780	. . . . . . . . . . . 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 24476	. . . . . . . . . . 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 5162	. . . . . . . . . 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 24265	. . . . . . . . . . . 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 24265	. . . . . . . . . . . 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 13025	. . . . . . . . . . . 12 ⊢ (𝑤 ∈ ℝ⁺ → 𝑤 ∈ ℝ^*)
44	43	ad2antrl 726	. . . . . . . . . . 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 13202	. . . . . . . . . . 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 278	. . . . . . . . 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 340	. . . . . . . 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 466	. . . . . . 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 3214	. . . . . 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 282	. . . . 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 3174	. . . 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 3175	. . 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 577	. 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 308	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 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ∀wral 3058 ∃wrex 3067 ifcif 4532 ⟨cop 4638 class class class wbr 5152 × cxp 5680 ⟶wf 6549 ‘cfv 6553 (class class class)co 7426 ℝ^*cxr 11287 < clt 11288 ≤ cle 11289 ℝ⁺crp 13016 distcds 17251 ×_s cxps 17497 ∞Metcxmet 21278 MetOpencmopn 21283 CnP ccnp 23157 ×_t ctx 23492 toMetSpctms 24253

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 2166 ax-ext 2699 ax-rep 5289 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7748 ax-cnex 11204 ax-resscn 11205 ax-1cn 11206 ax-icn 11207 ax-addcl 11208 ax-addrcl 11209 ax-mulcl 11210 ax-mulrcl 11211 ax-mulcom 11212 ax-addass 11213 ax-mulass 11214 ax-distr 11215 ax-i2m1 11216 ax-1ne0 11217 ax-1rid 11218 ax-rnegex 11219 ax-rrecex 11220 ax-cnre 11221 ax-pre-lttri 11222 ax-pre-lttrn 11223 ax-pre-ltadd 11224 ax-pre-mulgt0 11225 ax-pre-sup 11226

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-tp 4637 df-op 4639 df-uni 4913 df-int 4954 df-iun 5002 df-iin 5003 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-se 5638 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6310 df-ord 6377 df-on 6378 df-lim 6379 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-isom 6562 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-of 7692 df-om 7879 df-1st 8001 df-2nd 8002 df-supp 8174 df-frecs 8295 df-wrecs 8326 df-recs 8400 df-rdg 8439 df-1o 8495 df-2o 8496 df-er 8733 df-map 8855 df-ixp 8925 df-en 8973 df-dom 8974 df-sdom 8975 df-fin 8976 df-fsupp 9396 df-fi 9444 df-sup 9475 df-inf 9476 df-oi 9543 df-card 9972 df-pnf 11290 df-mnf 11291 df-xr 11292 df-ltxr 11293 df-le 11294 df-sub 11486 df-neg 11487 df-div 11912 df-nn 12253 df-2 12315 df-3 12316 df-4 12317 df-5 12318 df-6 12319 df-7 12320 df-8 12321 df-9 12322 df-n0 12513 df-z 12599 df-dec 12718 df-uz 12863 df-q 12973 df-rp 13017 df-xneg 13134 df-xadd 13135 df-xmul 13136 df-icc 13373 df-fz 13527 df-fzo 13670 df-seq 14009 df-hash 14332 df-struct 17125 df-sets 17142 df-slot 17160 df-ndx 17172 df-base 17190 df-ress 17219 df-plusg 17255 df-mulr 17256 df-sca 17258 df-vsca 17259 df-ip 17260 df-tset 17261 df-ple 17262 df-ds 17264 df-hom 17266 df-cco 17267 df-rest 17413 df-topn 17414 df-0g 17432 df-gsum 17433 df-topgen 17434 df-pt 17435 df-prds 17438 df-xrs 17493 df-qtop 17498 df-imas 17499 df-xps 17501 df-mre 17575 df-mrc 17576 df-acs 17578 df-mgm 18609 df-sgrp 18688 df-mnd 18704 df-submnd 18750 df-mulg 19038 df-cntz 19282 df-cmn 19751 df-psmet 21285 df-xmet 21286 df-bl 21288 df-mopn 21289 df-top 22824 df-topon 22841 df-topsp 22863 df-bases 22877 df-cn 23159 df-cnp 23160 df-tx 23494 df-hmeo 23687 df-xms 24254 df-tms 24256

This theorem is referenced by: txmetcn 24485 cxpcn3 26711

W3C validator