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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 23585 | . . 3 ⊢ ((𝐺 ∈ (II Cn II) ∧ 𝐹 ∈ (II Cn 𝐽)) → (𝐹 ∘ 𝐺) ∈ (II Cn 𝐽)) | |
| 4 | 1, 2, 3 | syl2anc 596 | . 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 2761 | . . . 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 25319 | . . 3 ⊢ (𝜑 → (𝑥 ∈ (0[,]1), 𝑦 ∈ (0[,]1) ↦ (𝐹‘(((1 − 𝑦) · (𝐺‘𝑥)) + (𝑦 · 𝑥)))) ∈ ((𝐹 ∘ 𝐺)(PHtpy‘𝐽)𝐹)) |
| 9 | 8 | ne0d 4288 | . 2 ⊢ (𝜑 → ((𝐹 ∘ 𝐺)(PHtpy‘𝐽)𝐹) ≠ ∅) |
| 10 | isphtpc 25316 | . 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 1362 | 1 ⊢ (𝜑 → (𝐹 ∘ 𝐺)( ≃ph‘𝐽)𝐹) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 ∅c0 4279 class class class wbr 5103 ∘ ccom 5655 ‘cfv 6539 (class class class)co 7421 ∈ cmpo 7423 0cc0 11201 1c1 11202 + caddc 11204 · cmul 11206 − cmin 11542 [,]cicc 13480 Cn ccn 23543 IIcii 25197 PHtpycphtpy 25290 ≃phcphtpc 25291 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 ax-addf 11280 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 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 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-of 7694 df-om 7879 df-1st 8002 df-2nd 8003 df-supp 8179 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-2o 8478 df-er 8718 df-map 8850 df-ixp 8927 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-fsupp 9355 df-fi 9404 df-sup 9435 df-inf 9436 df-oi 9505 df-card 10021 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-3 12407 df-4 12408 df-5 12409 df-6 12410 df-7 12411 df-8 12412 df-9 12413 df-n0 12608 df-z 12695 df-dec 12816 df-uz 12967 df-q 13077 df-rp 13122 df-xneg 13242 df-xadd 13243 df-xmul 13244 df-ioo 13481 df-icc 13484 df-fz 13641 df-fzo 13790 df-seq 14146 df-exp 14206 df-hash 14476 df-cj 15267 df-re 15268 df-im 15269 df-sqrt 15403 df-abs 15404 df-struct 17326 df-sets 17343 df-slot 17361 df-ndx 17373 df-base 17389 df-ress 17410 df-plusg 17442 df-mulr 17443 df-starv 17444 df-sca 17445 df-vsca 17446 df-ip 17447 df-tset 17448 df-ple 17449 df-ds 17451 df-unif 17452 df-hom 17453 df-cco 17454 df-rest 17594 df-topn 17595 df-0g 17613 df-gsum 17614 df-topgen 17615 df-pt 17616 df-prds 17619 df-xrs 17675 df-qtop 17680 df-imas 17681 df-xps 17683 df-mre 17757 df-mrc 17758 df-acs 17760 df-mgm 18817 df-sgrp 18909 df-mnd 18925 df-submnd 18980 df-mulg 19279 df-cntz 19532 df-cmn 19997 df-psmet 21671 df-xmet 21672 df-met 21673 df-bl 21674 df-mopn 21675 df-cnfld 21680 df-top 23213 df-topon 23230 df-topsp 23252 df-bases 23265 df-cn 23546 df-cnp 23547 df-tx 23882 df-hmeo 24075 df-xms 24640 df-ms 24641 df-tms 24642 df-ii 25199 df-htpy 25292 df-phtpy 25293 df-phtpc 25314 |
| This theorem is used by: pcopt 25344 pcopt2 25345 pcoass 25346 |
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