University of TabrizComputational Methods for Differential Equations2345-398210320220701Existence and properties of positive solutions for Caputo fractional difference equation and applications5675791390910.22034/cmde.2021.46257.1941ENTaherehHaghiDepartment of Mathematics, Sahand University of Technology, Tabriz, Iran.KazemGhanbariDepartment of Mathematics, Sahand University of Technology, Tabriz, Iran.Journal Article20210528This paper deals with a typical Caputo fractional differential equation. This equation appears in important applications such as modeling of medicine distributed throughout the body via injection and equation for general population growth. We use the fixed point theory of concave operators in specific normed spaces to find a parameter interval for which the unique positive solution exists. Some properties of positive solutions are studied and illustrative examples are given. https://cmde.tabrizu.ac.ir/article_13909_2b9e8bdc8391e5e59144eb54d65285cd.pdf