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on semicovering, subsemicovering, and subcovering maps
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نویسنده
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kowkabi m. ,mashayekhi b. ,torabi h.
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منبع
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journal of algebraic systems - 2020 - دوره : 7 - شماره : 2 - صفحه:227 -244
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چکیده
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In this paper, by reviewing the concept of subcovering and semicovering maps, we extend the notion of subcovering map to subsemicovering map. we present some necessary or sufficient conditions for a local homeomorphism to be a subsemicovering map. moreover, we investigate the relationship between these conditions by some examples. finally, we give a necessary and sufficient condition for a subsemicovering map to be semicovering.
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کلیدواژه
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local homeomorphism ,fundamental group ,covering map ,semicovering map subcovering map ,subsemicovering map
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آدرس
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university of gonabad, department of mathematics, iran, ferdowsi university of mashhad, department of pure mathematics, iran, ferdowsi university of mashhad, department of pure mathematics, iran
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پست الکترونیکی
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h.torabi@ferdowsi.um.ac.ir;h.torabi@um.ac.ir
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Authors
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