ismtybndlem - Mathbox for Jeff Madsen

	Mathbox for Jeff Madsen		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > ismtybndlem		Structured version Visualization version GIF version

Theorem ismtybndlem 36674

Description: Lemma for ismtybnd 36675. (Contributed by Jeff Madsen, 2-Sep-2009.) (Proof shortened by Mario Carneiro, 19-Jan-2014.)

**Assertion**
Ref	Expression
ismtybndlem	⊢ ((𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (𝑀 ∈ (Bnd‘𝑋) → 𝑁 ∈ (Bnd‘𝑌)))

Proof of Theorem ismtybndlem Dummy variables 𝑤 𝑟 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		isismty 36669	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌)) → (𝐹 ∈ (𝑀 Ismty 𝑁) ↔ (𝐹:𝑋–1-1-onto→𝑌 ∧ ∀𝑧 ∈ 𝑋 ∀𝑤 ∈ 𝑋 (𝑧𝑀𝑤) = ((𝐹‘𝑧)𝑁(𝐹‘𝑤)))))
2	1	biimp3a 1470	. . . . . . . . . . . 12 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (𝐹:𝑋–1-1-onto→𝑌 ∧ ∀𝑧 ∈ 𝑋 ∀𝑤 ∈ 𝑋 (𝑧𝑀𝑤) = ((𝐹‘𝑧)𝑁(𝐹‘𝑤))))
3	2	simpld 496	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → 𝐹:𝑋–1-1-onto→𝑌)
4		f1ocnv 6846	. . . . . . . . . . 11 ⊢ (𝐹:𝑋–1-1-onto→𝑌 → ^◡𝐹:𝑌–1-1-onto→𝑋)
5		f1of 6834	. . . . . . . . . . 11 ⊢ (^◡𝐹:𝑌–1-1-onto→𝑋 → ^◡𝐹:𝑌⟶𝑋)
6	3, 4, 5	3syl 18	. . . . . . . . . 10 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → ^◡𝐹:𝑌⟶𝑋)
7	6	ffvelcdmda 7087	. . . . . . . . 9 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑦 ∈ 𝑌) → (^◡𝐹‘𝑦) ∈ 𝑋)
8		oveq1 7416	. . . . . . . . . . . 12 ⊢ (𝑥 = (^◡𝐹‘𝑦) → (𝑥(ball‘𝑀)𝑟) = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟))
9	8	eqeq2d 2744	. . . . . . . . . . 11 ⊢ (𝑥 = (^◡𝐹‘𝑦) → (𝑋 = (𝑥(ball‘𝑀)𝑟) ↔ 𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)))
10	9	rexbidv 3179	. . . . . . . . . 10 ⊢ (𝑥 = (^◡𝐹‘𝑦) → (∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) ↔ ∃𝑟 ∈ ℝ⁺ 𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)))
11	10	rspcv 3609	. . . . . . . . 9 ⊢ ((^◡𝐹‘𝑦) ∈ 𝑋 → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → ∃𝑟 ∈ ℝ⁺ 𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)))
12	7, 11	syl 17	. . . . . . . 8 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑦 ∈ 𝑌) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → ∃𝑟 ∈ ℝ⁺ 𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)))
13		imaeq2 6056	. . . . . . . . . . 11 ⊢ (𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟) → (𝐹 “ 𝑋) = (𝐹 “ ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)))
14		f1ofo 6841	. . . . . . . . . . . . . 14 ⊢ (𝐹:𝑋–1-1-onto→𝑌 → 𝐹:𝑋–onto→𝑌)
15		foima 6811	. . . . . . . . . . . . . 14 ⊢ (𝐹:𝑋–onto→𝑌 → (𝐹 “ 𝑋) = 𝑌)
16	3, 14, 15	3syl 18	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (𝐹 “ 𝑋) = 𝑌)
17	16	adantr 482	. . . . . . . . . . . 12 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → (𝐹 “ 𝑋) = 𝑌)
18		rpxr 12983	. . . . . . . . . . . . . . . 16 ⊢ (𝑟 ∈ ℝ⁺ → 𝑟 ∈ ℝ^*)
19	18	adantl 483	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑟 ∈ ℝ⁺) → 𝑟 ∈ ℝ^*)
20	7, 19	anim12dan 620	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → ((^◡𝐹‘𝑦) ∈ 𝑋 ∧ 𝑟 ∈ ℝ^*))
21		ismtyima 36671	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ ((^◡𝐹‘𝑦) ∈ 𝑋 ∧ 𝑟 ∈ ℝ^*)) → (𝐹 “ ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)) = ((𝐹‘(^◡𝐹‘𝑦))(ball‘𝑁)𝑟))
22	20, 21	syldan 592	. . . . . . . . . . . . 13 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → (𝐹 “ ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)) = ((𝐹‘(^◡𝐹‘𝑦))(ball‘𝑁)𝑟))
23		simpl 484	. . . . . . . . . . . . . . 15 ⊢ ((𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺) → 𝑦 ∈ 𝑌)
24		f1ocnvfv2 7275	. . . . . . . . . . . . . . 15 ⊢ ((𝐹:𝑋–1-1-onto→𝑌 ∧ 𝑦 ∈ 𝑌) → (𝐹‘(^◡𝐹‘𝑦)) = 𝑦)
25	3, 23, 24	syl2an 597	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → (𝐹‘(^◡𝐹‘𝑦)) = 𝑦)
26	25	oveq1d 7424	. . . . . . . . . . . . 13 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → ((𝐹‘(^◡𝐹‘𝑦))(ball‘𝑁)𝑟) = (𝑦(ball‘𝑁)𝑟))
27	22, 26	eqtrd 2773	. . . . . . . . . . . 12 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → (𝐹 “ ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)) = (𝑦(ball‘𝑁)𝑟))
28	17, 27	eqeq12d 2749	. . . . . . . . . . 11 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → ((𝐹 “ 𝑋) = (𝐹 “ ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟)) ↔ 𝑌 = (𝑦(ball‘𝑁)𝑟)))
29	13, 28	imbitrid 243	. . . . . . . . . 10 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ (𝑦 ∈ 𝑌 ∧ 𝑟 ∈ ℝ⁺)) → (𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟) → 𝑌 = (𝑦(ball‘𝑁)𝑟)))
30	29	anassrs 469	. . . . . . . . 9 ⊢ ((((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑦 ∈ 𝑌) ∧ 𝑟 ∈ ℝ⁺) → (𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟) → 𝑌 = (𝑦(ball‘𝑁)𝑟)))
31	30	reximdva 3169	. . . . . . . 8 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑦 ∈ 𝑌) → (∃𝑟 ∈ ℝ⁺ 𝑋 = ((^◡𝐹‘𝑦)(ball‘𝑀)𝑟) → ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))
32	12, 31	syld 47	. . . . . . 7 ⊢ (((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) ∧ 𝑦 ∈ 𝑌) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))
33	32	ralrimdva 3155	. . . . . 6 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))
34		simp2 1138	. . . . . 6 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → 𝑁 ∈ (∞Met‘𝑌))
35	33, 34	jctild 527	. . . . 5 ⊢ ((𝑀 ∈ (∞Met‘𝑋) ∧ 𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → (𝑁 ∈ (∞Met‘𝑌) ∧ ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟))))
36	35	3expib 1123	. . . 4 ⊢ (𝑀 ∈ (∞Met‘𝑋) → ((𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → (𝑁 ∈ (∞Met‘𝑌) ∧ ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))))
37	36	com12 32	. . 3 ⊢ ((𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (𝑀 ∈ (∞Met‘𝑋) → (∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟) → (𝑁 ∈ (∞Met‘𝑌) ∧ ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))))
38	37	impd 412	. 2 ⊢ ((𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → ((𝑀 ∈ (∞Met‘𝑋) ∧ ∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟)) → (𝑁 ∈ (∞Met‘𝑌) ∧ ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟))))
39		isbndx 36650	. 2 ⊢ (𝑀 ∈ (Bnd‘𝑋) ↔ (𝑀 ∈ (∞Met‘𝑋) ∧ ∀𝑥 ∈ 𝑋 ∃𝑟 ∈ ℝ⁺ 𝑋 = (𝑥(ball‘𝑀)𝑟)))
40		isbndx 36650	. 2 ⊢ (𝑁 ∈ (Bnd‘𝑌) ↔ (𝑁 ∈ (∞Met‘𝑌) ∧ ∀𝑦 ∈ 𝑌 ∃𝑟 ∈ ℝ⁺ 𝑌 = (𝑦(ball‘𝑁)𝑟)))
41	38, 39, 40	3imtr4g 296	1 ⊢ ((𝑁 ∈ (∞Met‘𝑌) ∧ 𝐹 ∈ (𝑀 Ismty 𝑁)) → (𝑀 ∈ (Bnd‘𝑋) → 𝑁 ∈ (Bnd‘𝑌)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ∀wral 3062 ∃wrex 3071 ^◡ccnv 5676 “ cima 5680 ⟶wf 6540 –onto→wfo 6542 –1-1-onto→wf1o 6543 ‘cfv 6544 (class class class)co 7409 ℝ^*cxr 11247 ℝ⁺crp 12974 ∞Metcxmet 20929 ballcbl 20931 Bndcbnd 36635 Ismty cismty 36666

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-id 5575 df-po 5589 df-so 5590 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-1st 7975 df-2nd 7976 df-er 8703 df-ec 8705 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-2 12275 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-bnd 36647 df-ismty 36667

This theorem is referenced by: ismtybnd 36675

W3C validator