Quando20/11/2018 - 16:00
DoveSala Riunioni
ReferenteDario Fasino

Nonlinear Perron Eigenvectors: Theory and Applications to Network Analysis

Francesco Tudisco

Department of Mathematics & Statistics, University of Strathclyde, Glasgow

Tensors with nonnegative entries arise very naturally in numerous network-related applications and, as for the matrix case, one often is interested in their dominant positive eigenvectors and singular vectors. The power method is the algorithm of reference for this computation. However, unlike the matrix case, most of the eigenvector problems for tensors are NP-hard and [...]

Quando26/9/2018 - 16:30
DoveAula Multimediale
ReferenteAlberto Marcone

Describing the complexity of the "problem B is harder than problem A relation"

Paul Shafer

University of Leeds

Some mathematical problems are harder than others. Using concepts from computability theory, we formalize the "problem B is harder than problem A" relation and analyze its complexity. Our results express that this "harder than" relation is, in a certain sense, as complicated as possible, even when restricted to several special classes of mathematical [...]

Quando26/9/2018 - 14:00
DoveSala Riunioni
ReferenteAnna Giordano Bruno

Topological entropy of linearly compact vector spaces and left Bernoulli shifts

Ilaria Castellano

Università di Southampton (UK)

Quando18/9/2018 - 16:00
DoveSala riunioni
ReferenteGianluca Gorni

Le principali difficoltà nella didattica delle disequazioni: una raccolta di dati presso il liceo scientifico Niccolò Copernico

Stefania Ongaro

Laurea magistrale in Matematica

Quando27/7/2018 - 11:00
DoveAula Multimediale
ReferenteDimitri Breda

Estimating the spectrum of the Poincaré map of delay equations with periodic development delays: models, threshold dynamics and vector-borne disease risk prediction

Jianhong Wu

Università di York

To better understand the effects of seasonal temperature variation and host community composition on vector-borne disease pathogen transmission and spread, we have been developing stage-structured periodic deterministic models (both vector population ecological models dynamics models, and vector–host–pathogen epidemiological models). The models integrate seasonal vector development and activity, multiple host species and complex transmission routes between [...]