Leboukh, Somia2019-07-142019-07-142019http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/14938Fixed-point theorems are very important tools in functional analysis, in this memory we study the different between the Banach and Kannan's principle in two cases metric spaces and functional spaces.enFixed point, metric space, Banach space, contraction…Thesis