@conference {uvigo:conditions, title = {Stability conditions for the time-varying linear predictor}, booktitle = {IEEE Conference on Decision and Control (CDC)}, year = {1998}, month = {December}, pages = {1840{\textendash}1845}, address = {Tampa, FL, USA}, keywords = {nonstationary processes, prediction error filters, stability}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta and Minyue Fu and Roberto Tempo} }