171 citations · 171 across the 5 of their papers we have counts for
6 papers
Improved Pan-Private Stream Density Estimation
Vassilis Digalakis, George N. Karystinos, Minos N. Garofalakis
Differential privacy is a rigorous definition for privacy that guarantees that any analysis performed on a sensitive dataset leaks no information about the individuals whose data a…
Optimal Algorithms for -subspace Signal Processing
Panos P. Markopoulos, George N. Karystinos, Dimitris A. Pados
We describe ways to define and calculate -norm signal subspaces which are less sensitive to outlying data than -calculated subspaces. We start with the computation of the…
Fixed-rank Rayleigh Quotient Maximization by an PSK Sequence
Anastasios Kyrillidis, George N. Karystinos
Certain optimization problems in communication systems, such as limited-feedback constant-envelope beamforming or noncoherent -ary phase-shift keying (PSK) sequence detection…
The Sparse Principal Component of a Constant-rank Matrix
Megasthenis Asteris, Dimitris S. Papailiopoulos, George N. Karystinos
The computation of the sparse principal component of a matrix is equivalent to the identification of its principal submatrix with the largest maximum eigenvalue. Finding this optim…
Some Options for L1-Subspace Signal Processing
Panos P. Markopoulos, George N. Karystinos, Dimitris A. Pados
We describe ways to define and calculate -norm signal subspaces which are less sensitive to outlying data than -calculated subspaces. We focus on the computation of the $…
Sparse Principal Component of a Rank-deficient Matrix
Megasthenis Asteris, Dimitris S. Papailiopoulos, George N. Karystinos
We consider the problem of identifying the sparse principal component of a rank-deficient matrix. We introduce auxiliary spherical variables and prove that there exists a set of ca…