Detecting network backbones against time variations in node properties

Nonlinear Dynamics - Many real systems can be described through time-varying networks of interactions that encapsulate information sharing between individual units over time. These interactions can...     

Corrigendum to “A Morse–Smale index theorem for indefinite elliptic systems and bifurcation” [J. Differential Equations 258 (5) (2015) 1715–1748]

We discussed in a previous paper elliptic systems of partial differential equations on star-shaped domains and introduced the notions of conjugate radius and bifurcation radius. We proved that every bifurcation radius is a conjugate radius, and believed to have shown by an example that on the other hand not every conjugate radius is a bifurcation radius. This note reveals that our previous example was wrong, but it also introduces an improved example that shows the assertion that we claimed before.     

The Doubly-Transitive Focal-Spreads

For a finite bounded lattice ￡, we associate a zero-divisor graph G(￡) which is a natural generalization of the concept of zero-divisor graph for a Boolean algebra. Also, we study the interplay of lattice-theoretic properties of ￡ with graph-theoretic properties of G(￡).     

Incoherence correction strategies in statistical matching

Several economic applications require to consider different data sources and to integrate the information coming from them. This paper focuses on statistical matching, in particular we deal with incoherences. In fact, when logical constraints among the variables are present incoherencies on the probability evaluations can arise. The aim of this paper is to remove such incoherences by using different methods based on distances minimization or least commitment imprecise probabilities extensions. An illustrative example shows peculiarities of the different correction methods. Finally, limited to pseudo distance minimization, we performed a systematic comparison through a simulation study.     

On a question of Mauldin and Ulam concerning homeomorphisms

In this paper we solve a question of Mauldin and Ulam about transformations preserving homeomorphic pairs.