Incrimental version † Olga Kouropteva, Oleg Okun and Matti Pietik�inen, Incremental locally linear embedding, Pattern Recognition, Volume 38, Issue 10, , October 2005, Pages 1764-1767. http://dx.doi.org/10.1016/j.patcog.2005.04.006 ↑ Principal Manifold † Moghaddam, B., "Principal manifolds and probabilistic subspaces for visual recognition," Pattern Analysis and Machine Intelligence, IEEE Transac