The principal kernels of semifields of continuous positive functions

This work is devoted to the research of kernel lattices of semifields of continuous positive functions defined on some topological space. It is established that they are lattices with pseudo-complement. New characterizations of the following properties of topological spaces are obtained in terms of kernels, predominantly principal kernels, and semifields of continuous functions: to be an F-space, to be a P-space, basical and extremal disconnectedness, pseudo-compactness, and finiteness.