Electronic Journal of Differential Equations, Vol. 2021 (2021), No. 09, pp. 1-37. Title: Existence and global behavior of weak solutions to a doubly nonlinear evolution fractional p-Laplacian equation Authors: Jacques Giacomoni (Univ. de Pau et des Pays de l'Adour, France) Abdelhamid Gouasmia (Ecole Nationale Superieure, Algiers, Algeria) Abdelhafid Mokrane (Ecole Nationale Superieure, Algiers, Algeria) Abstract: In this article, we study a class of doubly nonlinear parabolic problems involving the fractional p-Laplace operator. For this problem, we discuss existence, uniqueness and regularity of the weak solutions by using the time-discretization method and monotone arguments. For global weak solutions, we also prove stabilization results by using the accretivity of a suitable associated operator. This property is strongly linked to the Picone identity that provides further a weak comparison principle, barrier estimates and uniqueness of the stationary positive weak solution. Submitted June 6, 2020. Published February 23, 2021. Math Subject Classifications: 35B40, 35K59, 35K55, 35K10, 35R11. Key Words: Fractional p-Laplace equation; doubly nonlinear evolution equation; Picone identity; stabilization; nonlinear semi-group theory.