M. Movahedi
Department of Mathematics, Faculty of Sciences, Alzahra University, Tehran, Iran.
[ 1 ] - On subdifferential in Hadamard spaces
In this paper, we deal with the subdierential concept onHadamard spaces. Flat Hadamard spaces are characterized, and nec-essary and sucient conditions are presented to prove that the subdif-ferential set in Hadamard spaces is nonempty. Proximal subdierentialin Hadamard spaces is addressed and some basic properties are high-lighted. Finally, a density theorem for subdierential set is established.
نویسندگان همکار