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Theorem imasf1obl 23844

Description: The image of a metric space ball. (Contributed by Mario Carneiro, 28-Aug-2015.)

**Hypotheses**
Ref	Expression
imasf1obl.u	⊢ (𝜑 → 𝑈 = (𝐹 “_s 𝑅))
imasf1obl.v	⊢ (𝜑 → 𝑉 = (Base‘𝑅))
imasf1obl.f	⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝐵)
imasf1obl.r	⊢ (𝜑 → 𝑅 ∈ 𝑍)
imasf1obl.e	⊢ 𝐸 = ((dist‘𝑅) ↾ (𝑉 × 𝑉))
imasf1obl.d	⊢ 𝐷 = (dist‘𝑈)
imasf1obl.m	⊢ (𝜑 → 𝐸 ∈ (∞Met‘𝑉))
imasf1obl.x	⊢ (𝜑 → 𝑃 ∈ 𝑉)
imasf1obl.s	⊢ (𝜑 → 𝑆 ∈ ℝ^*)

**Assertion**
Ref	Expression
imasf1obl	⊢ (𝜑 → ((𝐹‘𝑃)(ball‘𝐷)𝑆) = (𝐹 “ (𝑃(ball‘𝐸)𝑆)))

Proof of Theorem imasf1obl Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		imasf1obl.f	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝐵)
2		f1ocnvfv2 7223	. . . . . . . . . 10 ⊢ ((𝐹:𝑉–1-1-onto→𝐵 ∧ 𝑥 ∈ 𝐵) → (𝐹‘(^◡𝐹‘𝑥)) = 𝑥)
3	1, 2	sylan 580	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐹‘(^◡𝐹‘𝑥)) = 𝑥)
4	3	oveq2d 7373	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((𝐹‘𝑃)𝐷(𝐹‘(^◡𝐹‘𝑥))) = ((𝐹‘𝑃)𝐷𝑥))
5		imasf1obl.u	. . . . . . . . . 10 ⊢ (𝜑 → 𝑈 = (𝐹 “_s 𝑅))
6	5	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑈 = (𝐹 “_s 𝑅))
7		imasf1obl.v	. . . . . . . . . 10 ⊢ (𝜑 → 𝑉 = (Base‘𝑅))
8	7	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑉 = (Base‘𝑅))
9	1	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐹:𝑉–1-1-onto→𝐵)
10		imasf1obl.r	. . . . . . . . . 10 ⊢ (𝜑 → 𝑅 ∈ 𝑍)
11	10	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑅 ∈ 𝑍)
12		imasf1obl.e	. . . . . . . . 9 ⊢ 𝐸 = ((dist‘𝑅) ↾ (𝑉 × 𝑉))
13		imasf1obl.d	. . . . . . . . 9 ⊢ 𝐷 = (dist‘𝑈)
14		imasf1obl.m	. . . . . . . . . 10 ⊢ (𝜑 → 𝐸 ∈ (∞Met‘𝑉))
15	14	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐸 ∈ (∞Met‘𝑉))
16		imasf1obl.x	. . . . . . . . . 10 ⊢ (𝜑 → 𝑃 ∈ 𝑉)
17	16	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑃 ∈ 𝑉)
18		f1ocnv 6796	. . . . . . . . . . . 12 ⊢ (𝐹:𝑉–1-1-onto→𝐵 → ^◡𝐹:𝐵–1-1-onto→𝑉)
19	1, 18	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → ^◡𝐹:𝐵–1-1-onto→𝑉)
20		f1of 6784	. . . . . . . . . . 11 ⊢ (^◡𝐹:𝐵–1-1-onto→𝑉 → ^◡𝐹:𝐵⟶𝑉)
21	19, 20	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → ^◡𝐹:𝐵⟶𝑉)
22	21	ffvelcdmda 7035	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (^◡𝐹‘𝑥) ∈ 𝑉)
23	6, 8, 9, 11, 12, 13, 15, 17, 22	imasdsf1o 23727	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((𝐹‘𝑃)𝐷(𝐹‘(^◡𝐹‘𝑥))) = (𝑃𝐸(^◡𝐹‘𝑥)))
24	4, 23	eqtr3d 2778	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((𝐹‘𝑃)𝐷𝑥) = (𝑃𝐸(^◡𝐹‘𝑥)))
25	24	breq1d 5115	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (((𝐹‘𝑃)𝐷𝑥) < 𝑆 ↔ (𝑃𝐸(^◡𝐹‘𝑥)) < 𝑆))
26		imasf1obl.s	. . . . . . . 8 ⊢ (𝜑 → 𝑆 ∈ ℝ^*)
27	26	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑆 ∈ ℝ^*)
28		elbl2 23743	. . . . . . 7 ⊢ (((𝐸 ∈ (∞Met‘𝑉) ∧ 𝑆 ∈ ℝ^*) ∧ (𝑃 ∈ 𝑉 ∧ (^◡𝐹‘𝑥) ∈ 𝑉)) → ((^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆) ↔ (𝑃𝐸(^◡𝐹‘𝑥)) < 𝑆))
29	15, 27, 17, 22, 28	syl22anc 837	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆) ↔ (𝑃𝐸(^◡𝐹‘𝑥)) < 𝑆))
30	25, 29	bitr4d 281	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (((𝐹‘𝑃)𝐷𝑥) < 𝑆 ↔ (^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆)))
31	30	pm5.32da 579	. . . 4 ⊢ (𝜑 → ((𝑥 ∈ 𝐵 ∧ ((𝐹‘𝑃)𝐷𝑥) < 𝑆) ↔ (𝑥 ∈ 𝐵 ∧ (^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆))))
32	5, 7, 1, 10, 12, 13, 14	imasf1oxmet 23728	. . . . 5 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝐵))
33		f1of 6784	. . . . . . 7 ⊢ (𝐹:𝑉–1-1-onto→𝐵 → 𝐹:𝑉⟶𝐵)
34	1, 33	syl 17	. . . . . 6 ⊢ (𝜑 → 𝐹:𝑉⟶𝐵)
35	34, 16	ffvelcdmd 7036	. . . . 5 ⊢ (𝜑 → (𝐹‘𝑃) ∈ 𝐵)
36		elbl 23741	. . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝐵) ∧ (𝐹‘𝑃) ∈ 𝐵 ∧ 𝑆 ∈ ℝ^*) → (𝑥 ∈ ((𝐹‘𝑃)(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝐵 ∧ ((𝐹‘𝑃)𝐷𝑥) < 𝑆)))
37	32, 35, 26, 36	syl3anc 1371	. . . 4 ⊢ (𝜑 → (𝑥 ∈ ((𝐹‘𝑃)(ball‘𝐷)𝑆) ↔ (𝑥 ∈ 𝐵 ∧ ((𝐹‘𝑃)𝐷𝑥) < 𝑆)))
38		f1ofn 6785	. . . . 5 ⊢ (^◡𝐹:𝐵–1-1-onto→𝑉 → ^◡𝐹 Fn 𝐵)
39		elpreima 7008	. . . . 5 ⊢ (^◡𝐹 Fn 𝐵 → (𝑥 ∈ (^◡^◡𝐹 “ (𝑃(ball‘𝐸)𝑆)) ↔ (𝑥 ∈ 𝐵 ∧ (^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆))))
40	19, 38, 39	3syl 18	. . . 4 ⊢ (𝜑 → (𝑥 ∈ (^◡^◡𝐹 “ (𝑃(ball‘𝐸)𝑆)) ↔ (𝑥 ∈ 𝐵 ∧ (^◡𝐹‘𝑥) ∈ (𝑃(ball‘𝐸)𝑆))))
41	31, 37, 40	3bitr4d 310	. . 3 ⊢ (𝜑 → (𝑥 ∈ ((𝐹‘𝑃)(ball‘𝐷)𝑆) ↔ 𝑥 ∈ (^◡^◡𝐹 “ (𝑃(ball‘𝐸)𝑆))))
42	41	eqrdv 2734	. 2 ⊢ (𝜑 → ((𝐹‘𝑃)(ball‘𝐷)𝑆) = (^◡^◡𝐹 “ (𝑃(ball‘𝐸)𝑆)))
43		imacnvcnv 6158	. 2 ⊢ (^◡^◡𝐹 “ (𝑃(ball‘𝐸)𝑆)) = (𝐹 “ (𝑃(ball‘𝐸)𝑆))
44	42, 43	eqtrdi 2792	1 ⊢ (𝜑 → ((𝐹‘𝑃)(ball‘𝐷)𝑆) = (𝐹 “ (𝑃(ball‘𝐸)𝑆)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 class class class wbr 5105 × cxp 5631 ^◡ccnv 5632 ↾ cres 5635 “ cima 5636 Fn wfn 6491 ⟶wf 6492 –1-1-onto→wf1o 6495 ‘cfv 6496 (class class class)co 7357 ℝ^*cxr 11188 < clt 11189 Basecbs 17083 distcds 17142 “_s cimas 17386 ∞Metcxmet 20781 ballcbl 20783

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 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-cnex 11107 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 ax-pre-sup 11129

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 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-tp 4591 df-op 4593 df-uni 4866 df-int 4908 df-iun 4956 df-iin 4957 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-se 5589 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-isom 6505 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-of 7617 df-om 7803 df-1st 7921 df-2nd 7922 df-supp 8093 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-1o 8412 df-er 8648 df-map 8767 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-fsupp 9306 df-sup 9378 df-inf 9379 df-oi 9446 df-card 9875 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-div 11813 df-nn 12154 df-2 12216 df-3 12217 df-4 12218 df-5 12219 df-6 12220 df-7 12221 df-8 12222 df-9 12223 df-n0 12414 df-z 12500 df-dec 12619 df-uz 12764 df-rp 12916 df-xneg 13033 df-xadd 13034 df-xmul 13035 df-fz 13425 df-fzo 13568 df-seq 13907 df-hash 14231 df-struct 17019 df-sets 17036 df-slot 17054 df-ndx 17066 df-base 17084 df-ress 17113 df-plusg 17146 df-mulr 17147 df-sca 17149 df-vsca 17150 df-ip 17151 df-tset 17152 df-ple 17153 df-ds 17155 df-0g 17323 df-gsum 17324 df-xrs 17384 df-imas 17390 df-mre 17466 df-mrc 17467 df-acs 17469 df-mgm 18497 df-sgrp 18546 df-mnd 18557 df-submnd 18602 df-mulg 18873 df-cntz 19097 df-cmn 19564 df-psmet 20788 df-xmet 20789 df-bl 20791

This theorem is referenced by: imasf1oxms 23845

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