txmetcnp - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > txmetcnp		Structured version Visualization version GIF version

Theorem txmetcnp 24055

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 2732	. . . 4 ⊢ (dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷))) = (dist‘((toMetSp‘𝐶) ×_s (toMetSp‘𝐷)))
2		simpl1 1191	. . . 4 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐶 ∈ (∞Met‘𝑋))
3		simpl2 1192	. . . 4 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐷 ∈ (∞Met‘𝑌))
4	1, 2, 3	tmsxps 24044	. . 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 1193	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → 𝐸 ∈ (∞Met‘𝑍))
6		opelxpi 5713	. . . 4 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
7	6	adantl 482	. . 3 ⊢ (((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝐸 ∈ (∞Met‘𝑍)) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑌)) → ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑌))
8		eqid 2732	. . . 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 24049	. . 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 1371	. 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 24045	. . . . 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 7423	. . . 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 6893	. . 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 2819	. 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 7416	. . . . . . . . 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 5158	. . . . . . . 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 7411	. . . . . . . . . . 11 ⊢ (𝐴𝐹𝐵) = (𝐹‘⟨𝐴, 𝐵⟩)
21	20	oveq1i 7418	. . . . . . . . . 10 ⊢ ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥))
22		fveq2 6891	. . . . . . . . . . . 12 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝐹‘⟨𝑢, 𝑣⟩))
23		df-ov 7411	. . . . . . . . . . . 12 ⊢ (𝑢𝐹𝑣) = (𝐹‘⟨𝑢, 𝑣⟩)
24	22, 23	eqtr4di 2790	. . . . . . . . . . 11 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → (𝐹‘𝑥) = (𝑢𝐹𝑣))
25	24	oveq2d 7424	. . . . . . . . . 10 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐴𝐹𝐵)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
26	21, 25	eqtr3id 2786	. . . . . . . . 9 ⊢ (𝑥 = ⟨𝑢, 𝑣⟩ → ((𝐹‘⟨𝐴, 𝐵⟩)𝐸(𝐹‘𝑥)) = ((𝐴𝐹𝐵)𝐸(𝑢𝐹𝑣)))
27	26	breq1d 5158	. . . . . . . 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 5841	. . . . . 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 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))) → 𝐴 ∈ 𝑋)
34	32	simprd 496	. . . . . . . . . . . 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 24047	. . . . . . . . . . 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 5158	. . . . . . . . . 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 23836	. . . . . . . . . . . 12 ⊢ ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝑢 ∈ 𝑋) → (𝐴𝐶𝑢) ∈ ℝ^*)
40	30, 33, 35, 39	syl3anc 1371	. . . . . . . . . . 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 23836	. . . . . . . . . . . 12 ⊢ ((𝐷 ∈ (∞Met‘𝑌) ∧ 𝐵 ∈ 𝑌 ∧ 𝑣 ∈ 𝑌) → (𝐵𝐷𝑣) ∈ ℝ^*)
42	31, 34, 36, 41	syl3anc 1371	. . . . . . . . . . 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 12982	. . . . . . . . . . . 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 13159	. . . . . . . . . . 11 ⊢ (((𝐴𝐶𝑢) ∈ ℝ^* ∧ (𝐵𝐷𝑣) ∈ ℝ^* ∧ 𝑤 ∈ ℝ^*) → (if((𝐴𝐶𝑢) ≤ (𝐵𝐷𝑣), (𝐵𝐷𝑣), (𝐴𝐶𝑢)) < 𝑤 ↔ ((𝐴𝐶𝑢) < 𝑤 ∧ (𝐵𝐷𝑣) < 𝑤)))
46	40, 42, 44, 45	syl3anc 1371	. . . . . . . . . 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 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 468	. . . . . . 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 3216	. . . . . 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 3176	. . . 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 3177	. . 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 579	. 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 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ∀wral 3061 ∃wrex 3070 ifcif 4528 ⟨cop 4634 class class class wbr 5148 × cxp 5674 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 ℝ^*cxr 11246 < clt 11247 ≤ cle 11248 ℝ⁺crp 12973 distcds 17205 ×_s cxps 17451 ∞Metcxmet 20928 MetOpencmopn 20933 CnP ccnp 22728 ×_t ctx 23063 toMetSpctms 23824

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-of 7669 df-om 7855 df-1st 7974 df-2nd 7975 df-supp 8146 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-2o 8466 df-er 8702 df-map 8821 df-ixp 8891 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-fsupp 9361 df-fi 9405 df-sup 9436 df-inf 9437 df-oi 9504 df-card 9933 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12472 df-z 12558 df-dec 12677 df-uz 12822 df-q 12932 df-rp 12974 df-xneg 13091 df-xadd 13092 df-xmul 13093 df-icc 13330 df-fz 13484 df-fzo 13627 df-seq 13966 df-hash 14290 df-struct 17079 df-sets 17096 df-slot 17114 df-ndx 17126 df-base 17144 df-ress 17173 df-plusg 17209 df-mulr 17210 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-hom 17220 df-cco 17221 df-rest 17367 df-topn 17368 df-0g 17386 df-gsum 17387 df-topgen 17388 df-pt 17389 df-prds 17392 df-xrs 17447 df-qtop 17452 df-imas 17453 df-xps 17455 df-mre 17529 df-mrc 17530 df-acs 17532 df-mgm 18560 df-sgrp 18609 df-mnd 18625 df-submnd 18671 df-mulg 18950 df-cntz 19180 df-cmn 19649 df-psmet 20935 df-xmet 20936 df-bl 20938 df-mopn 20939 df-top 22395 df-topon 22412 df-topsp 22434 df-bases 22448 df-cn 22730 df-cnp 22731 df-tx 23065 df-hmeo 23258 df-xms 23825 df-tms 23827

This theorem is referenced by: txmetcn 24056 cxpcn3 26253

W3C validator