Topology of Semi open sets

This Book of the present authors is a first attempt to make young scholars in the field of Topology to understand the extension of open sets to semi-open set and its impact on Topology. In this book authors tried to educate first time learners of Topology and young researchers to get an idea of the extension process. As many type of open sets are now in the field of Topology, the collection of semi-open sets is the first extension done long back which generalized the idea of Topology to a higher level.