LIBPMF -- A Library for Large-scale Parallel Matrix Factorization Version 1.42 is released on Jan 03, 2020. Make Python 3 interface compatiable. Version 1.41 is released on April 24, 2014. A small bug in the R interface is fixed. Version 1.4 is released on Sep 23, 2013. A matlab interface is included. Version 1.3 is released on Aug 28, 2013. The option to support nonnegative constraints is include