Application Of The Seifert-Van Kampen Theorem To Certain Sums Of Topological Spaces

Mohd. Altab Hossain
2012 Journal of Bangladesh Academy of Sciences  
Seifert-Van Kampen theorem for the sum X + Y and external sum X  Y of topological spaces is studied and the fundamental groups of these sums have been determined.
doi:10.3329/jbas.v35i2.9424 fatcat:staoflndzrfu7dpvitq6skkfxy