ON SEMICOVERING, SUBSEMICOVERING, AND SUBCOVERING MAPS | ||
| Journal of Algebraic Systems | ||
| مقاله 10، دوره 7، شماره 2، فروردین 2020، صفحه 227-244 اصل مقاله (208.27 K) | ||
| نوع مقاله: Original Manuscript | ||
| شناسه دیجیتال (DOI): 10.22044/jas.2019.6941.1367 | ||
| نویسندگان | ||
| M. Kowkabi1؛ B. Mashayekhi2؛ H. Torabi* 2 | ||
| 1Department of Mathematics, University of Gonabad, P.O. Box 57678-96919, Gonabad, Iran. | ||
| 2Department of Pure Mathematics, Ferdowsi University of Mashhad, P.O. Box 1159- 91775, Mashhad, Iran. | ||
| چکیده | ||
| 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. | ||
| کلیدواژهها | ||
| local homeomorphism؛ fundamental group؛ covering map؛ semicovering map subcovering map؛ subsemicovering map | ||
|
آمار تعداد مشاهده مقاله: 640 تعداد دریافت فایل اصل مقاله: 698 |
||