@unpublished{ Oseledets.Rakhuba.Uschmajew:2017, author = {Ivan V. Oseledets and Maxim V. Rakhuba and Andr{\'e} Uschmajew}, title = {Alternating least squares as moving subspace correction}, year = {2017}, month = {sep}, annote = {preprint}, note = {INS Preprint No. 1712}, inspreprintnum= {1712}, preprint = {1709.07286}, archiveprefix = "arXiv" }