Keyphrases
- sparse matrix
- matrix representation
- eigenvalues and eigenvectors
- transformation matrix
- symmetric matrix
- feature vectors
- covariance matrix
- low rank
- dot product
- weight matrix
- rows and columns
- positive definite
- linearly independent
- linear algebra
- singular value decomposition
- least squares
- vector data
- data sets
- weight vector
- face recognition
- case study
- symmetric matrices
- feature selection