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Approximations of 1-dimensional intrinsic persistence of geodesic spaces and their stabilityVirk, Žiga, 1982-Standarden način aproksimacije ali diskretizacije metričnega prostora vključuje konstrukcijo Ripsovih kompleksov. Kolekcijo takih aproksimacij za vse parametre povežemo v filtracijo, na kateri ... uporabimo funktorja fundamentalne grupe ali prve homologije. Dobljenemu objektu bomo rekli vztrajnost. Pred kratkim dobljeni rezultati nakazujejo, da vztrajnost kompaktnega geodezičnega lokalno kontraktibilnega prostora ▫$X$▫ vsebuje geometrijsko informacijo o prostoru. Taka vztrajnost po definiciji uporablja Ripsove komplekse na neštevno mnogo točkah. V tem članku pokažemo, da lahko kljub temu celotno vztrajnost ▫$X$▫ dobimo iz ustreznega končnega vzorca. Poleg tega pokažemo, da je vztrajnost poljubnega končnega vzorca dobro prepletena z vztrajnostjo celotnega prostora. Iz teh ugotovitev sledi, da je vztrajnost prostora minimum vztrajnosti, dobljenih z uporabo končnih podprostorov. Poleg tega dokažemo precej izboljšan izrek o stabilnosti za aproksimacije s končnimi podmnožicami. Kot poseben primer lahko podamo za poljuben ▫$r > 0$▫ gostoto ▫$s > 0$▫, tako da je za vsako ▫$s$▫-gosto podmnožico ▫$S$▫ v ▫$X$▫, pripadajoča fundamentalna grupa Ripsovega kompleksa ▫$S$▫ pri ▫$r$▫ izomofrna fundamentalni grupi Ripsovega kompleksa ▫$X$▫ pri ▫$r$▫, iz česar sledi izboljšan rekonstrukcijski rezultat.Source: Revista matemática complutense. - ISSN 1139-1138 (Vol. 32, iss. 1, Jan. 2019, str. 195-213)Type of material - article, component part ; adult, seriousPublish date - 2019Language - englishCOBISS.SI-ID - 18410073
Author
Virk, Žiga, 1982-
Topics
vztrajnost |
geodetski prostor |
geodetska krožnica |
Ripsov kompleks |
persistence |
geodesic space |
minimal homology basis |
geodesic circle |
Rips complex
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Virk, Žiga, 1982- | 26522 |
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