elhoi - Mathbox for Glauco Siliprandi

	Mathbox for Glauco Siliprandi		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > elhoi		Structured version Visualization version GIF version

Theorem elhoi 42831

Description: Membership in a multidimensional half-open interval. (Contributed by Glauco Siliprandi, 11-Oct-2020.)

**Hypothesis**
Ref	Expression
elhoi.1	⊢ (𝜑 → 𝑋 ∈ 𝑉)

**Assertion**
Ref	Expression
elhoi	⊢ (𝜑 → (𝑌 ∈ ((𝐴[,)𝐵) ↑_m 𝑋) ↔ (𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵))))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐵 𝑥,𝑋 𝑥,𝑌 Allowed substitution hints: 𝜑(𝑥) 𝑉(𝑥)

**Proof of Theorem elhoi**
Step	Hyp	Ref	Expression
1		ovexd 7193	. . 3 ⊢ (𝜑 → (𝐴[,)𝐵) ∈ V)
2		elhoi.1	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝑉)
3		elmapg 8421	. . 3 ⊢ (((𝐴[,)𝐵) ∈ V ∧ 𝑋 ∈ 𝑉) → (𝑌 ∈ ((𝐴[,)𝐵) ↑_m 𝑋) ↔ 𝑌:𝑋⟶(𝐴[,)𝐵)))
4	1, 2, 3	syl2anc 586	. 2 ⊢ (𝜑 → (𝑌 ∈ ((𝐴[,)𝐵) ↑_m 𝑋) ↔ 𝑌:𝑋⟶(𝐴[,)𝐵)))
5		id 22	. . . . . 6 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) → 𝑌:𝑋⟶(𝐴[,)𝐵))
6		icossxr 12824	. . . . . . 7 ⊢ (𝐴[,)𝐵) ⊆ ℝ^*
7	6	a1i 11	. . . . . 6 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) → (𝐴[,)𝐵) ⊆ ℝ^*)
8	5, 7	fssd 6530	. . . . 5 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) → 𝑌:𝑋⟶ℝ^*)
9		ffvelrn 6851	. . . . . 6 ⊢ ((𝑌:𝑋⟶(𝐴[,)𝐵) ∧ 𝑥 ∈ 𝑋) → (𝑌‘𝑥) ∈ (𝐴[,)𝐵))
10	9	ralrimiva 3184	. . . . 5 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) → ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵))
11	8, 10	jca 514	. . . 4 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) → (𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)))
12		ffn 6516	. . . . . . 7 ⊢ (𝑌:𝑋⟶ℝ^* → 𝑌 Fn 𝑋)
13	12	adantr 483	. . . . . 6 ⊢ ((𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)) → 𝑌 Fn 𝑋)
14		simpr 487	. . . . . 6 ⊢ ((𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)) → ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵))
15	13, 14	jca 514	. . . . 5 ⊢ ((𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)) → (𝑌 Fn 𝑋 ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)))
16		ffnfv 6884	. . . . 5 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) ↔ (𝑌 Fn 𝑋 ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)))
17	15, 16	sylibr 236	. . . 4 ⊢ ((𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)) → 𝑌:𝑋⟶(𝐴[,)𝐵))
18	11, 17	impbii 211	. . 3 ⊢ (𝑌:𝑋⟶(𝐴[,)𝐵) ↔ (𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵)))
19	18	a1i 11	. 2 ⊢ (𝜑 → (𝑌:𝑋⟶(𝐴[,)𝐵) ↔ (𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵))))
20	4, 19	bitrd 281	1 ⊢ (𝜑 → (𝑌 ∈ ((𝐴[,)𝐵) ↑_m 𝑋) ↔ (𝑌:𝑋⟶ℝ^* ∧ ∀𝑥 ∈ 𝑋 (𝑌‘𝑥) ∈ (𝐴[,)𝐵))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∈ wcel 2114 ∀wral 3140 Vcvv 3496 ⊆ wss 3938 Fn wfn 6352 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 ↑_m cmap 8408 ℝ^*cxr 10676 [,)cico 12743

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-1st 7691 df-2nd 7692 df-map 8410 df-xr 10681 df-ico 12747

This theorem is referenced by: (None)

W3C validator