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| Mirrors > Home > MPE Home > Th. List > reparpht | Structured version Visualization version GIF version | ||
| Description: Reparametrization lemma. The reparametrization of a path by any continuous map 𝐺:II⟶II with 𝐺(0) = 0 and 𝐺(1) = 1 is path-homotopic to the original path. (Contributed by Jeff Madsen, 15-Jun-2010.) (Revised by Mario Carneiro, 23-Feb-2015.) |
| Ref | Expression |
|---|---|
| reparpht.1 | ⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽)) |
| reparpht.2 | ⊢ (𝜑 → 𝐺 ∈ (II Cn II)) |
| reparpht.3 | ⊢ (𝜑 → (𝐺‘0) = 0) |
| reparpht.4 | ⊢ (𝜑 → (𝐺‘1) = 1) |
| Ref | Expression |
|---|---|
| reparpht | ⊢ (𝜑 → (𝐹 ∘ 𝐺)( ≃ph‘𝐽)𝐹) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reparpht.2 | . . 3 ⊢ (𝜑 → 𝐺 ∈ (II Cn II)) | |
| 2 | reparpht.1 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (II Cn 𝐽)) | |
| 3 | cnco 23434 | . . 3 ⊢ ((𝐺 ∈ (II Cn II) ∧ 𝐹 ∈ (II Cn 𝐽)) → (𝐹 ∘ 𝐺) ∈ (II Cn 𝐽)) | |
| 4 | 1, 2, 3 | syl2anc 595 | . 2 ⊢ (𝜑 → (𝐹 ∘ 𝐺) ∈ (II Cn 𝐽)) |
| 5 | reparpht.3 | . . . 4 ⊢ (𝜑 → (𝐺‘0) = 0) | |
| 6 | reparpht.4 | . . . 4 ⊢ (𝜑 → (𝐺‘1) = 1) | |
| 7 | eqid 2762 | . . . 4 ⊢ (𝑥 ∈ (0[,]1), 𝑦 ∈ (0[,]1) ↦ (𝐹‘(((1 − 𝑦) · (𝐺‘𝑥)) + (𝑦 · 𝑥)))) = (𝑥 ∈ (0[,]1), 𝑦 ∈ (0[,]1) ↦ (𝐹‘(((1 − 𝑦) · (𝐺‘𝑥)) + (𝑦 · 𝑥)))) | |
| 8 | 2, 1, 5, 6, 7 | reparphti 25167 | . . 3 ⊢ (𝜑 → (𝑥 ∈ (0[,]1), 𝑦 ∈ (0[,]1) ↦ (𝐹‘(((1 − 𝑦) · (𝐺‘𝑥)) + (𝑦 · 𝑥)))) ∈ ((𝐹 ∘ 𝐺)(PHtpy‘𝐽)𝐹)) |
| 9 | 8 | ne0d 4294 | . 2 ⊢ (𝜑 → ((𝐹 ∘ 𝐺)(PHtpy‘𝐽)𝐹) ≠ ∅) |
| 10 | isphtpc 25164 | . 2 ⊢ ((𝐹 ∘ 𝐺)( ≃ph‘𝐽)𝐹 ↔ ((𝐹 ∘ 𝐺) ∈ (II Cn 𝐽) ∧ 𝐹 ∈ (II Cn 𝐽) ∧ ((𝐹 ∘ 𝐺)(PHtpy‘𝐽)𝐹) ≠ ∅)) | |
| 11 | 4, 2, 9, 10 | syl3anbrc 1361 | 1 ⊢ (𝜑 → (𝐹 ∘ 𝐺)( ≃ph‘𝐽)𝐹) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2142 ≠ wne 2957 ∅c0 4285 class class class wbr 5108 ∘ ccom 5664 ‘cfv 6536 (class class class)co 7412 ∈ cmpo 7414 0cc0 11106 1c1 11107 + caddc 11109 · cmul 11111 − cmin 11447 [,]cicc 13381 Cn ccn 23392 IIcii 25045 PHtpycphtpy 25138 ≃phcphtpc 25139 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-iin 4958 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-se 5614 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7676 df-om 7861 df-1st 7984 df-2nd 7985 df-supp 8155 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-1o 8451 df-2o 8452 df-er 8692 df-map 8824 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9320 df-fi 9369 df-sup 9400 df-inf 9401 df-oi 9470 df-card 9932 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-div 11878 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-9 12316 df-n0 12511 df-z 12598 df-dec 12718 df-uz 12869 df-q 12979 df-rp 13023 df-xneg 13143 df-xadd 13144 df-xmul 13145 df-ioo 13382 df-icc 13385 df-fz 13542 df-fzo 13690 df-seq 14045 df-exp 14105 df-hash 14374 df-cj 15157 df-re 15158 df-im 15159 df-sqrt 15293 df-abs 15294 df-struct 17213 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-ress 17297 df-plusg 17329 df-mulr 17330 df-starv 17331 df-sca 17332 df-vsca 17333 df-ip 17334 df-tset 17335 df-ple 17336 df-ds 17338 df-unif 17339 df-hom 17340 df-cco 17341 df-rest 17481 df-topn 17482 df-0g 17500 df-gsum 17501 df-topgen 17502 df-pt 17503 df-prds 17506 df-xrs 17562 df-qtop 17567 df-imas 17568 df-xps 17570 df-mre 17644 df-mrc 17645 df-acs 17647 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-submnd 18848 df-mulg 19140 df-cntz 19393 df-cmn 19858 df-psmet 21525 df-xmet 21526 df-met 21527 df-bl 21528 df-mopn 21529 df-cnfld 21534 df-top 23062 df-topon 23079 df-topsp 23101 df-bases 23114 df-cn 23395 df-cnp 23396 df-tx 23730 df-hmeo 23923 df-xms 24488 df-ms 24489 df-tms 24490 df-ii 25047 df-htpy 25140 df-phtpy 25141 df-phtpc 25162 |
| This theorem is used by: pcopt 25192 pcopt2 25193 pcoass 25194 |
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