ThisbookprovidesabroadsurveyofmodelsandefficientalgorithmsforNonnegativeMatrixFactorization(NMF).ThisincludesNMF’svariousextensionsandmodifications,especiallyNonnegativeTensorFactorizations(NTF)andNonnegativeTuckerDecompositions(NTD).NMF/NTFandtheirextensionsareincreasinglyusedastoolsinsign