8 citations · 28 across the 27 of their papers we have counts for
32 papers
Edge-based Katz centralities for spatio-temporal multiplex networks
Kai Bergermann, Francesco Gravili, Valeria Simoncini +1
Katz centrality is a well-established measure to identify and rank the most important nodes in complex networks by means of a linear system solve. Recent works have developed notio…
Regularized methods via cubic model subspace minimization for nonconvex optimization
Stefania Bellavia, Davide Palitta, Margherita Porcelli +1
Adaptive cubic regularization methods for solving nonconvex problems need the efficient computation of the trial step, involving the minimization of a cubic model. We propose a new…
Sketched and truncated polynomial Krylov methods: Evaluation of matrix functions
Davide Palitta, Marcel Schweitzer, Valeria Simoncini
Among randomized numerical linear algebra strategies, so-called sketching procedures are emerging as effective reduction means to accelerate the computation of Krylov subspace meth…
Numerical solution of a class of quasi-linear matrix equations
Margherita Porcelli, Valeria Simoncini
Given the matrix equation in the unknown matrix , we analyze existence and uniqueness conditions, toget…
Very Weak Space-Time Variational Formulation for the Wave Equation: Analysis and Efficient Numerical Solution
Julian Henning, Davide Palitta, Valeria Simoncini +1
We introduce a very weak space-time variational formulation for the wave equation, prove its well-posedness (even in the case of minimal regularity) and optimal inf-sup stability.…
A spectral PALM algorithm for matrix and tensor-train based Dictionary Learning
Domitilla Brandoni, Margherita Porcelli, Valeria Simoncini
Dictionary Learning (DL) is one of the leading sparsity promoting techniques in the context of image classification, where the "dictionary" matrix D of images and the sparse matrix…