CosaSeminario
Quando20/11/2018 - 16:00
DoveSala Riunioni
ReferenteDario Fasino
Emaildario.fasino@uniud.it

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 [...]

CosaSeminario
Quando26/9/2018 - 16:30
DoveAula Multimediale
ReferenteAlberto Marcone
Emailalberto.marcone@uniud.it

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 [...]

CosaSeminario
Quando26/9/2018 - 14:00
DoveSala Riunioni
ReferenteAnna Giordano Bruno
Emailanna.giordanobruno@uniud.it

Topological entropy of linearly compact vector spaces and left Bernoulli shifts

Ilaria Castellano

Università di Southampton (UK)

CosaSeminario
Quando18/9/2018 - 16:00
DoveSala riunioni
ReferenteGianluca Gorni
Emailgianluca.gorni@uniud.it

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

Stefania Ongaro

Laurea magistrale in Matematica

CosaSeminario
Quando27/7/2018 - 11:00
DoveAula Multimediale
ReferenteDimitri Breda
Emaildimitri.breda@uniud.it

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 [...]