1 citations · 1 across the 2 of their papers we have counts for
6 papers
Sharp Fourier Extension on the Circle Under Arithmetic Constraints
Valentina Ciccone, Felipe Gonçalves
We establish a sharp adjoint Fourier restriction inequality for the end-point Tomas-Stein restriction theorem on the circle under a certain arithmetic constraint on the support set…
Regularized transport between singular covariance matrices
Valentina Ciccone, Yongxin Chen, Tryphon T. Georgiou +1
We consider the problem of steering a linear stochastic system between two end-point degenerate Gaussian distributions in finite time. This accounts for those situations in which s…
Robust Identification of "Sparse Plus Low-rank" Graphical Models: An Optimization Approach
Valentina Ciccone, Augusto Ferrante, Mattia Zorzi
Motivated by graphical models, we consider the "Sparse Plus Low-rank" decomposition of a positive definite concentration matrix -- the inverse of the covariance matrix. This is a c…
An alternating minimization algorithm for Factor Analysis
Valentina Ciccone, Augusto Ferrante, Mattia Zorzi
The problem of decomposing a given covariance matrix as the sum of a positive semi-definite matrix of given rank and a positive semi-definite diagonal matrix, is considered. We pre…
Factor Models with Real Data: a Robust Estimation of the Number of Factors
Valentina Ciccone, Augusto Ferrante, Mattia Zorzi
Factor models are a very efficient way to describe high dimensional vectors of data in terms of a small number of common relevant factors. This problem, which is of fundamental imp…
Factor analysis with finite data
Valentina Ciccone, Augusto Ferrante, Mattia Zorzi
Factor analysis aims to describe high dimensional random vectors by means of a small number of unknown common factors. In mathematical terms, it is required to decompose the covari…