elpi1i - Metamath Proof Explorer

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Theorem elpi1i 24944

Description: The elements of the fundamental group. (Contributed by Jeff Madsen, 19-Jun-2010.) (Revised by Mario Carneiro, 10-Jul-2015.)

**Hypotheses**
Ref	Expression
elpi1.g	⊢ 𝐺 = (𝐽 π₁ 𝑌)
elpi1.b	⊢ 𝐵 = (Base‘𝐺)
elpi1.1	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
elpi1.2	⊢ (𝜑 → 𝑌 ∈ 𝑋)
elpi1i.3	⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽))
elpi1i.4	⊢ (𝜑 → (𝐹‘0) = 𝑌)
elpi1i.5	⊢ (𝜑 → (𝐹‘1) = 𝑌)

**Assertion**
Ref	Expression
elpi1i	⊢ (𝜑 → [𝐹]( ≃_ph‘𝐽) ∈ 𝐵)

Proof of Theorem elpi1i Dummy variable 𝑓 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elpi1i.3	. . 3 ⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽))
2		elpi1i.4	. . 3 ⊢ (𝜑 → (𝐹‘0) = 𝑌)
3		elpi1i.5	. . 3 ⊢ (𝜑 → (𝐹‘1) = 𝑌)
4		eceq1 8664	. . . . . . 7 ⊢ (𝑓 = 𝐹 → [𝑓]( ≃_ph‘𝐽) = [𝐹]( ≃_ph‘𝐽))
5	4	eqcomd 2735	. . . . . 6 ⊢ (𝑓 = 𝐹 → [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽))
6	5	biantrud 531	. . . . 5 ⊢ (𝑓 = 𝐹 → (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ↔ (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽))))
7		fveq1 6821	. . . . . . 7 ⊢ (𝑓 = 𝐹 → (𝑓‘0) = (𝐹‘0))
8	7	eqeq1d 2731	. . . . . 6 ⊢ (𝑓 = 𝐹 → ((𝑓‘0) = 𝑌 ↔ (𝐹‘0) = 𝑌))
9		fveq1 6821	. . . . . . 7 ⊢ (𝑓 = 𝐹 → (𝑓‘1) = (𝐹‘1))
10	9	eqeq1d 2731	. . . . . 6 ⊢ (𝑓 = 𝐹 → ((𝑓‘1) = 𝑌 ↔ (𝐹‘1) = 𝑌))
11	8, 10	anbi12d 632	. . . . 5 ⊢ (𝑓 = 𝐹 → (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ↔ ((𝐹‘0) = 𝑌 ∧ (𝐹‘1) = 𝑌)))
12	6, 11	bitr3d 281	. . . 4 ⊢ (𝑓 = 𝐹 → ((((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽)) ↔ ((𝐹‘0) = 𝑌 ∧ (𝐹‘1) = 𝑌)))
13	12	rspcev 3577	. . 3 ⊢ ((𝐹 ∈ (II Cn 𝐽) ∧ ((𝐹‘0) = 𝑌 ∧ (𝐹‘1) = 𝑌)) → ∃𝑓 ∈ (II Cn 𝐽)(((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽)))
14	1, 2, 3, 13	syl12anc 836	. 2 ⊢ (𝜑 → ∃𝑓 ∈ (II Cn 𝐽)(((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽)))
15		elpi1.g	. . 3 ⊢ 𝐺 = (𝐽 π₁ 𝑌)
16		elpi1.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
17		elpi1.1	. . 3 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
18		elpi1.2	. . 3 ⊢ (𝜑 → 𝑌 ∈ 𝑋)
19	15, 16, 17, 18	elpi1 24943	. 2 ⊢ (𝜑 → ([𝐹]( ≃_ph‘𝐽) ∈ 𝐵 ↔ ∃𝑓 ∈ (II Cn 𝐽)(((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃_ph‘𝐽) = [𝑓]( ≃_ph‘𝐽))))
20	14, 19	mpbird 257	1 ⊢ (𝜑 → [𝐹]( ≃_ph‘𝐽) ∈ 𝐵)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∃wrex 3053 ‘cfv 6482 (class class class)co 7349 [cec 8623 0cc0 11009 1c1 11010 Basecbs 17120 TopOnctopon 22795 Cn ccn 23109 IIcii 24766 ≃_phcphtpc 24866 π₁ cpi1 24901

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5218 ax-sep 5235 ax-nul 5245 ax-pow 5304 ax-pr 5371 ax-un 7671 ax-cnex 11065 ax-resscn 11066 ax-1cn 11067 ax-icn 11068 ax-addcl 11069 ax-addrcl 11070 ax-mulcl 11071 ax-mulrcl 11072 ax-mulcom 11073 ax-addass 11074 ax-mulass 11075 ax-distr 11076 ax-i2m1 11077 ax-1ne0 11078 ax-1rid 11079 ax-rnegex 11080 ax-rrecex 11081 ax-cnre 11082 ax-pre-lttri 11083 ax-pre-lttrn 11084 ax-pre-ltadd 11085 ax-pre-mulgt0 11086 ax-pre-sup 11087

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3343 df-reu 3344 df-rab 3395 df-v 3438 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-tp 4582 df-op 4584 df-uni 4859 df-int 4897 df-iun 4943 df-iin 4944 df-br 5093 df-opab 5155 df-mpt 5174 df-tr 5200 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-se 5573 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6249 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6438 df-fun 6484 df-fn 6485 df-f 6486 df-f1 6487 df-fo 6488 df-f1o 6489 df-fv 6490 df-isom 6491 df-riota 7306 df-ov 7352 df-oprab 7353 df-mpo 7354 df-of 7613 df-om 7800 df-1st 7924 df-2nd 7925 df-supp 8094 df-frecs 8214 df-wrecs 8245 df-recs 8294 df-rdg 8332 df-1o 8388 df-2o 8389 df-er 8625 df-ec 8627 df-qs 8631 df-map 8755 df-ixp 8825 df-en 8873 df-dom 8874 df-sdom 8875 df-fin 8876 df-fsupp 9252 df-fi 9301 df-sup 9332 df-inf 9333 df-oi 9402 df-card 9835 df-pnf 11151 df-mnf 11152 df-xr 11153 df-ltxr 11154 df-le 11155 df-sub 11349 df-neg 11350 df-div 11778 df-nn 12129 df-2 12191 df-3 12192 df-4 12193 df-5 12194 df-6 12195 df-7 12196 df-8 12197 df-9 12198 df-n0 12385 df-z 12472 df-dec 12592 df-uz 12736 df-q 12850 df-rp 12894 df-xneg 13014 df-xadd 13015 df-xmul 13016 df-ioo 13252 df-icc 13255 df-fz 13411 df-fzo 13558 df-seq 13909 df-exp 13969 df-hash 14238 df-cj 15006 df-re 15007 df-im 15008 df-sqrt 15142 df-abs 15143 df-struct 17058 df-sets 17075 df-slot 17093 df-ndx 17105 df-base 17121 df-ress 17142 df-plusg 17174 df-mulr 17175 df-starv 17176 df-sca 17177 df-vsca 17178 df-ip 17179 df-tset 17180 df-ple 17181 df-ds 17183 df-unif 17184 df-hom 17185 df-cco 17186 df-rest 17326 df-topn 17327 df-0g 17345 df-gsum 17346 df-topgen 17347 df-pt 17348 df-prds 17351 df-xrs 17406 df-qtop 17411 df-imas 17412 df-qus 17413 df-xps 17414 df-mre 17488 df-mrc 17489 df-acs 17491 df-mgm 18514 df-sgrp 18593 df-mnd 18609 df-submnd 18658 df-mulg 18947 df-cntz 19196 df-cmn 19661 df-psmet 21253 df-xmet 21254 df-met 21255 df-bl 21256 df-mopn 21257 df-cnfld 21262 df-top 22779 df-topon 22796 df-topsp 22818 df-bases 22831 df-cld 22904 df-cn 23112 df-cnp 23113 df-tx 23447 df-hmeo 23640 df-xms 24206 df-ms 24207 df-tms 24208 df-ii 24768 df-htpy 24867 df-phtpy 24868 df-phtpc 24889 df-om1 24904 df-pi1 24906

This theorem is referenced by: pi1inv 24950 pi1xfrf 24951 pi1cof 24957 sconnpi1 35212

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