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| Mirrors > Home > MPE Home > Th. List > elpi1i | Structured version Visualization version GIF version | ||
| Description: The elements of the fundamental group. (Contributed by Jeff Madsen, 19-Jun-2010.) (Revised by Mario Carneiro, 10-Jul-2015.) |
| 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) |
| Ref | Expression |
|---|---|
| elpi1i | ⊢ (𝜑 → [𝐹]( ≃ph‘𝐽) ∈ 𝐵) |
| 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 8739 | . . . . . . 7 ⊢ (𝑓 = 𝐹 → [𝑓]( ≃ph‘𝐽) = [𝐹]( ≃ph‘𝐽)) | |
| 5 | 4 | eqcomd 2766 | . . . . . 6 ⊢ (𝑓 = 𝐹 → [𝐹]( ≃ph‘𝐽) = [𝑓]( ≃ph‘𝐽)) |
| 6 | 5 | biantrud 541 | . . . . 5 ⊢ (𝑓 = 𝐹 → (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ↔ (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃ph‘𝐽) = [𝑓]( ≃ph‘𝐽)))) |
| 7 | fveq1 6878 | . . . . . . 7 ⊢ (𝑓 = 𝐹 → (𝑓‘0) = (𝐹‘0)) | |
| 8 | 7 | eqeq1d 2762 | . . . . . 6 ⊢ (𝑓 = 𝐹 → ((𝑓‘0) = 𝑌 ↔ (𝐹‘0) = 𝑌)) |
| 9 | fveq1 6878 | . . . . . . 7 ⊢ (𝑓 = 𝐹 → (𝑓‘1) = (𝐹‘1)) | |
| 10 | 9 | eqeq1d 2762 | . . . . . 6 ⊢ (𝑓 = 𝐹 → ((𝑓‘1) = 𝑌 ↔ (𝐹‘1) = 𝑌)) |
| 11 | 8, 10 | anbi12d 644 | . . . . 5 ⊢ (𝑓 = 𝐹 → (((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ↔ ((𝐹‘0) = 𝑌 ∧ (𝐹‘1) = 𝑌))) |
| 12 | 6, 11 | bitr3d 284 | . . . 4 ⊢ (𝑓 = 𝐹 → ((((𝑓‘0) = 𝑌 ∧ (𝑓‘1) = 𝑌) ∧ [𝐹]( ≃ph‘𝐽) = [𝑓]( ≃ph‘𝐽)) ↔ ((𝐹‘0) = 𝑌 ∧ (𝐹‘1) = 𝑌))) |
| 13 | 12 | rspcev 3576 | . . 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 850 | . 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 25276 | . 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 260 | 1 ⊢ (𝜑 → [𝐹]( ≃ph‘𝐽) ∈ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∃wrex 3086 ‘cfv 6533 (class class class)co 7414 [cec 8697 0cc0 11127 1c1 11128 Basecbs 17304 TopOnctopon 23138 Cn ccn 23452 IIcii 25106 ≃phcphtpc 25200 π1 cpi1 25234 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-of 7679 df-om 7864 df-1st 7987 df-2nd 7988 df-supp 8160 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-2o 8459 df-er 8699 df-ec 8701 df-qs 8705 df-map 8831 df-ixp 8908 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-fsupp 9335 df-fi 9384 df-sup 9415 df-inf 9416 df-oi 9485 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-dec 12740 df-uz 12891 df-q 13001 df-rp 13046 df-xneg 13166 df-xadd 13167 df-xmul 13168 df-ioo 13405 df-icc 13408 df-fz 13565 df-fzo 13713 df-seq 14069 df-exp 14129 df-hash 14398 df-cj 15189 df-re 15190 df-im 15191 df-sqrt 15325 df-abs 15326 df-struct 17242 df-sets 17259 df-slot 17277 df-ndx 17289 df-base 17305 df-ress 17326 df-plusg 17358 df-mulr 17359 df-starv 17360 df-sca 17361 df-vsca 17362 df-ip 17363 df-tset 17364 df-ple 17365 df-ds 17367 df-unif 17368 df-hom 17369 df-cco 17370 df-rest 17510 df-topn 17511 df-0g 17529 df-gsum 17530 df-topgen 17531 df-pt 17532 df-prds 17535 df-xrs 17591 df-qtop 17596 df-imas 17597 df-qus 17598 df-xps 17599 df-mre 17673 df-mrc 17674 df-acs 17676 df-mgm 18733 df-sgrp 18824 df-mnd 18840 df-submnd 18895 df-mulg 19194 df-cntz 19447 df-cmn 19912 df-psmet 21580 df-xmet 21581 df-met 21582 df-bl 21583 df-mopn 21584 df-cnfld 21589 df-top 23122 df-topon 23139 df-topsp 23161 df-bases 23174 df-cld 23247 df-cn 23455 df-cnp 23456 df-tx 23791 df-hmeo 23984 df-xms 24549 df-ms 24550 df-tms 24551 df-ii 25108 df-htpy 25201 df-phtpy 25202 df-phtpc 25223 df-om1 25237 df-pi1 25239 |
| This theorem is used by: pi1inv 25283 pi1xfrf 25284 pi1cof 25290 sconnpi1 35821 |
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