FIXED POINT PROBLEMS IN CAT(1) SPACES (Study on Nonlinear Analysis and Convex Analysis)

We state existence and convergence theorems for finding fixed points of spherically nonspreading mappings in CAT(1) spaces. These results can be applied to convex optimization in such spaces

APPROXIMATION OF MINIMIZERS OF CONVEX FUNCTIONS IN HADAMARD SPACES (Study on Nonlinear Analysis and Convex Analysis)

We introduce existence and convergence theorems on two modified proximal point algorithms for convex functions in Hadamard spaces