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Title:Inverse limits in the category of compact Hausdorff spaces and upper semicontinuous functions
Authors:ID Banič, Iztok (Author)
ID Sovič, Tina (Author)
Files:URL http://www.imfm.si/preprinti/PDF/01188.pdf
 
Language:English
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:V članku obravnavamo inverzne limite v kategoriji ▫$mathcal{CHU}$▫ kompaktnih Hausdorffovih prostorov in navzgor polzveznih (u.s.c) preslikav. Vpeljemo pojem šibkih inverznih limit in pokažemo, da inverzne limite z navzgor polzveznimi veznimi preslikavami skupaj s projekcijami niso nujno inverzne limite v ▫$mathcal{CHU}$▫, so pa vedno šibke inverzne limite v tej kategoriji. Med drugim gre za realizacijo kategorijalnega pristopa k reševanju problema, ki ga je zastavil W. T. Ingram.
Keywords:topologija, kategorije, navzgor polzvezne funkcije, inverzne limite, posplošene inverzne limite, šibke inverzne limite, topology, upper semi-continuous functions, inverse limits, generalized inverse limits, weak inverse limits
Year of publishing:2013
Number of pages:str. 1-15
Numbering:Vol. 51, št. 1188
PID:20.500.12556/DKUM-52016 New window
UDC:515.126
ISSN on article:2232-2094
COBISS.SI-ID:16625753 New window
NUK URN:URN:SI:UM:DK:OCYY9TOT
Publication date in DKUM:10.07.2015
Views:27345
Downloads:107
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Categories:Misc.
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Record is a part of a journal

Title:Preprint series
Publisher:Inštitut za matematiko, fiziko in mehaniko
ISSN:2232-2094
COBISS.SI-ID:15706713 New window

Secondary language

Language:Slovenian
Title:Inverzne limite v kategoriji kompaktnih Hausdorffovih prostorov in navzgor polzveznih funkcij
Abstract:We investigate inverse limits in the category ▫$mathcal{CHU}$▫ of compact Hausdorff spaces with upper semicontinuous (usc) functions. We introduce the notion of weak inverse limits in this category and show that the inverse limits with upper semicontinuous set-valued bonding functions (as they were defined in [W. T. Ingram, W. S.~Mahavier, Inverse limits of upper semi-continuous set valued functions, Houston J. Math. 32 (2006), 119--130]) together with the projections are not necessarily inverse limits in ▫$mathcal{CHU}$▫ but they are always weak inverse limits in this category. This is a realization of our categorical approach to solving a problem stated by W. T. Ingram in [W. T. Ingram, An Introduction to Inverse Limits with Set-valued Functions, Springer, New York etc., 2012].


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