International Journal of Mathematics and Mathematical Sciences
Volume 11 (1988), Issue 1, Pages 205-207
doi:10.1155/S0161171288000249
Abstract
Let f:X→Y be a continuous semigroup homomorphism. Conditions are given which will ensure that the semigroup X∪Y is a topological semigroup, when the modified Whyburn topology is placed on X∪Y.