@unpublished{ Hosseini:2015, author = {S. Hosseini}, title = {Convergence of nonsmooth descent methods via {K}urdyka--{{\L}{}}ojasiewicz inequality on {R}iemannian manifolds}, year = {2015}, month = {nov}, annote = {preprint}, pdf = {http://neitzel.ins.uni-bonn.de/research/pub/hosseini/8_INS1523.pdf} , note = {INS Preprint No. 1523. Revised version, July 2017}, inspreprintnum= {1523} }