@unpublished{ Absil.Hosseini:2017, author = {Pierre-Antoine Absil and Seyedehsomayeh Hosseini}, title = {A collection of nonsmooth {R}iemannian optimization problems}, year = {2017}, month = {sep}, annote = {preprint}, pdf = {http://neitzel.ins.uni-bonn.de/research/pub/hosseini/ISNM_NRO_09PA.pdf} , note = {INS Preprint No. 1713}, inspreprintnum= {1713} }