Symmetric Matrix and Tensor Decomposition // Provides symmetric matrix and tensor operations and decomposition algorithms including symmetric NMF (symNMF), PageRank, Label Propagation, Higher-order Power Method, and TOPHITS. Designed to work with 'rTensor' objects. Methods are described in Kuang et al. (2012) doi:10.1137/1.9781611972825.10, Kolda and Mayo (2011) doi:10.1137/100801482, and Kolda and Bader (2006) doi:10.1137/1.9781611972764.26.