LPP:LocalityPreservingProjections %Note:Afterapplyingsomesimplealgebra,thesmallesteigenvalueproblem: %data^T*L*data=\lemdadata^T*D*data %isequivalenttothelargesteigenvalueproblem: %data^T*W*data=\betadata^T*D*data %whereL=D-W;\lemda=1-\beta. %Thus,the