Title of article :
ON SEMICOVERING, SUBSEMICOVERING, AND SUBCOVERING MAPS
Author/Authors :
Kowkabi ، M. - University of Gonabad , Mashayekhi ، B. - Ferdowsi University of Mashhad , Torabi ، H. - Ferdowsi University of Mashhad
Abstract :
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.
Keywords :
Local homeomorphism , fundamental group , covering map , semicovering map subcovering map , subsemicovering map
Journal title :
Journal of Algebraic Systems
Journal title :
Journal of Algebraic Systems
