Open AccessStrong Insertion of a Contra-continuous Function between Two Comparable Contra-precontinuous (Contra-semi-continuous) of Real-valued Functions
Author(s) -
M. Mirmiran,
Binesh Naderi
Publication year - 2020
Publication title -
earthline journal of mathematical sciences
Language(s) - English
Resource type - Journals
ISSN - 2581-8147
DOI - 10.34198/ejms.3220.279295
Subject(s) - function (biology) , continuous function (set theory) , mathematics , real valued function , kernel (algebra) , pure mathematics , discrete mathematics , evolutionary biology , biology
Necessary and sufficient conditions in terms of lower cut sets are given for the strong insertion of a contra-continuous function between two comparable real-valued functions on such topological spaces that kernel of sets are open.