In this thesis the gamma distribution is considered for the reason of it’s appearance in many statistical fields of applications. Some mathematical and statistical properties of the distribution are collected and unified.
Planar noninvertible maps have been studied recently by several authors such as Mira , Gardini , Cathala.
The main theme of this thesis is oriented toward three objectives.The first objective, is a study to fuzzy set theory with some basic properties related to differential equations.The second objective, is a study and prove of the existence and uniqueness theorem of fuzzy differential equations using two approaches, the first is by Brower fixed point theorem and the other by Schauder fixed point theorem.
