Doctoral School in Mathematical Sciences
http://dottorato.math.unipd.it
dottorato.math.unipd.itenConcorso ammissione Dottorato XXXIII ciclo
http://dottorato.math.unipd.it/node/157
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<a href="http://dottorato.math.unipd.it/sites/default/files/ValutazioneTitoli_1.pdf">Valutazione Titoli</a>
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Wed, 28 Jun 2017 09:17:18 +0000servizio157 at http://dottorato.math.unipd.itBiodiversity: Mathematical Modelling and Statistics
http://dottorato.math.unipd.it/node/156
<p>Wednesday 14 June 2017 h.14:30, Room 2BC30<br />
Anna Tovo (Padova, Dip. Mat.)<br />
“Biodiversity: Mathematical Modelling and Statistics"</p>
<p>Abstract<br />
Ecological systems are characterized by the emergence of universal patterns that are deemed to be insensitive to the details of the system. Such universality motivates the understanding of ecological patterns through mathematical models able to grasp basic mechanisms at work. With this talk, we will try to describe and analyze the elements that underlie these patterns as well as the patterns themselves from a mathematical point of view. In particular we will focus on biodiversity. Identifying and understanding the relationships between all the life on Earth are some of the greatest challenges in science. After a brief introduction aiming to define the basic concepts of biodiversity and its related patterns, we will see different models developed to predict and measure them. We will then tackle the problem of upscaling biodiversity through spatial scales and we will discuss some still open problems that interest the scientific community.<br />
The seminar is intended for a general audience and it will thus be held at an introductory level.</p>
Fri, 09 Jun 2017 09:54:52 +0000servizio156 at http://dottorato.math.unipd.itThe influence of network structure in neuronal information transmission
http://dottorato.math.unipd.it/node/155
<p>Wednesday 31 May 2017 h.14:30, Room 2BC30<br />
Giacomo Baggio (Padova, DEI)<br />
“The influence of network structure in neuronal information transmission"</p>
<p>Abstract<br />
Understanding how neurons communicate is one of the most challenging open problems in neuroscience. In this talk, I will present some recent results aiming at formulating this problem from a mathematical and information-theoretic viewpoint. After an overview on neuronal network dynamical models, I will introduce a digital communication framework for studying the information transmission problem in a neuronal network driven by linear dynamics. Within this framework, a novel metric for measuring the information capacity of a neuronal network based on Shannon’s capacity and the notion of inter-symbol interference will be discussed. Finally, I will illustrate how the structure of the network matrix and, in particular, its departure from normality, affects the information capacity of a network.<br />
The talk will be introductory in nature and it is intended for a general audience.</p>
Mon, 29 May 2017 06:34:52 +0000servizio155 at http://dottorato.math.unipd.itVariational Approaches in Shape Partitioning
http://dottorato.math.unipd.it/node/154
<p>Wednesday 3 May 2017 h.14:30, Room 2BC30<br />
Martin Huska (Padova, Dip. Mat.)<br />
“Variational Approaches in Shape Partitioning"</p>
<p>Abstract<br />
The rapid development of 3D scanning technology has incredibly increased the availability of digital models exploited for a wide range of applications varying from computer graphics and medical imaging up to industrial production. One fundamental procedure that processes the raw acquired data for further manipulation, e.g. in product design, animation, deformation and reverse engineering, is the shape partitioning. This process consists in the decomposition of an object into non-overlapping salient sub-parts determined by a shape attribute.<br />
In this seminar, we will introduce the concept of Shape Partitioning together with the wide range of partitioning methods. Next, we will observe a few partitioning/segmentation models in the field providing some results. At last, if the time allows, we will introduce the concept of Convex-Nonconvex segmentation over surfaces. The seminar will be held at introductory level, thus, general audience is welcome to participate.</p>
Thu, 27 Apr 2017 08:25:44 +0000servizio154 at http://dottorato.math.unipd.itAn introduction to domain perturbation theory for elliptic eigenvalue problems
http://dottorato.math.unipd.it/node/153
<p>Wednesday 29 March 2017 h.14:30, Room 2BC30<br />
Francesco Ferraresso (Padova, Dip. Mat.)<br />
“An introduction to domain perturbation theory for elliptic eigenvalue problems”</p>
<p>Abstract<br />
How does the sound of a drum depend on its shape? This weak variant of the classical question “Can one hear the shape of a drum?” can be considered in the framework of domain perturbation theory for elliptic differential operators. Starting with easy examples we will see that the answer to this apparently harmless question is rather different in the case of regular perturbations and in the case of singular perturbations. We will focus on the singular case, where the geometry of the problem is deeply mixed with the differential structure, in particular with the boundary conditions. Finally, we will give an account of recent advances in the study of a specific singular perturbation (the dumbbell domain) for the Laplace operator and for the biharmonic operator.<br />
The seminar is intended for a general audience and it aims to introduce basic concepts from spectral theory as well as more advanced research results.</p>
Fri, 24 Mar 2017 10:55:26 +0000servizio153 at http://dottorato.math.unipd.itQuantized option pricing in Mathematical Finance
http://dottorato.math.unipd.it/node/152
<p>Wednesday 15 March 2017 h.14:30, Room 2BC30<br />
Lucio Fiorin (Padova, Dip. Mat.)<br />
“Quantized option pricing in Mathematical Finance”</p>
<p>Abstract<br />
Quantization is a widely used tool in Signal Processing and Numerical Probability, and it has been recently applied to Mathematical Finance. The quantization of a continuous random variable consists in finding the “best” discrete version of it, i.e. minimizing the L^2 distance. It is possible, using this technique, to create new algorithms for the pricing of European options under different models of the underlying asset.<br />
In this seminar we introduce the basic tools used in mathematical finance and we will present the most common results in the theory of option pricing. After a brief discussion on the existing models of the price of a financial asset, we will give the audience some ideas on how quantization can be a powerful tool able to overcome existing problems.</p>
Mon, 13 Mar 2017 07:42:19 +0000servizio152 at http://dottorato.math.unipd.itTopology, analysis and the Riemann-Hilbert correspondence
http://dottorato.math.unipd.it/node/151
<p>Wednesday 1 March 2017 h.14:30, Room 2BC30<br />
Christopher Lazda (Padova, INdAM Marie Curie Fellow)<br />
“Topology, analysis and the Riemann-Hilbert correspondence”</p>
<p>Abstract<br />
The Riemann-Hilbert correspondence gives a way of passing back and forth between topology and differential geometry, describing the behaviour of differential equations in terms of the monodromy of their local solutions. Starting with the example of the logarithm, I will give an introduction to the ideas behind this correspondence in a concrete and down to earth manner, concentrating on the case of Riemann surfaces. If there is time I will also explain how this gives a completely algebraic way to study topological invariants.</p>
Fri, 24 Feb 2017 09:30:40 +0000servizio151 at http://dottorato.math.unipd.itCollective periodic behavior in interacting particle systems
http://dottorato.math.unipd.it/node/150
<p>Wednesday 15 February 2017 h.14:30, Room 2BC30<br />
Daniele Tovazzi (Padova, Dip. Mat.)<br />
“Collective periodic behavior in interacting particle systems"</p>
<p>Abstract<br />
Interacting particle systems constitute a wide class of models, originally motivated by Statistical Mechanics, which in the last decades have become more and more popular, extending their applications to various fields of research such as Biology and Social Sciences. These models are important tools that may be used to study macroscopic behaviors observed in complex systems. Among these phenomena, a very interesting one is collective periodic behavior, in which the system exhibits the emergence of macroscopic rhythmic oscillations even though single components have no natural tendency to behave periodically.<br />
This talk aims to introduce to a general audience some basic tools in the theory of interacting particle systems and some of the mechanisms which can enhance the appearance of self-sustained macroscopic rhythm. After recalling some notions of Probability, we present the classical Curie-Weiss model, which doesn't exhibit periodic behavior, and we show how we can modify it in order to create macroscopic oscillations. This is also the starting point for some recent developments that will be sketched in the last part of the talk.</p>
Mon, 13 Feb 2017 09:12:13 +0000servizio150 at http://dottorato.math.unipd.itZeta functions associated to profinite groups
http://dottorato.math.unipd.it/node/149
<p>Wednesday 1 February 2017 h.14:30, Room 2BC30<br />
Leone Cimetta (Padova, Dip. Mat.)<br />
“Zeta functions associated to profinite groups”</p>
<p>Abstract<br />
In this seminar we will discuss the properties of some Dirichlet series associated to a group G satisfying specific topological properties. These series deal with two important problems arisen in the last century, which both had a great development over the last decades.<br />
The first problem (the subgroup growth of a profinite group G) involves the behaviour of the function a_n(G), that is the number of subgroups of G of index n.<br />
The second problem consists in determining the probability that, randomly choosing n elements of a group, we get a generating set for the whole group.<br />
The second problem, in particular, arises from a famous work by P. Hall, which solved it in 1936 in the finite case.<br />
After recalling some basic definitions, we will present the motivations for the problems; then, starting from some examples and classical results for finite groups, we will give some ideas to develop both problems in the profinite case and show some relations between the series involved.</p>
Mon, 30 Jan 2017 07:40:27 +0000servizio149 at http://dottorato.math.unipd.itSecure And Scalable Management of Internet of Things Deployments
http://dottorato.math.unipd.it/node/148
<p>Wednesday 18 January 2017 h.14:30, Room 2BC30<br />
Moreno Ambrosin (Padova, Dip. Mat.)<br />
“Secure And Scalable Management of Internet of Things Deployments”</p>
<p>Abstract<br />
In recent years, the advent of Internet of Things (IoT) is populating the world with billions of low cost heterogeneous interconnected devices. IoT devices are quickly penetrating in many aspects of our daily lives, and enabling new innovative services, ranging from fitness tracking, to factory automation. Unfortunately, their wide use, as well as their low-cost nature, makes IoT devices also an attractive target for cyber attackers, which may exploit them to perform various type of attacks, such as Denial of Service (DoS) attacks or privacy violation of end users. Furthermore, the potentially very large scale of IoT systems and deployments, makes the use of existing security solutions practically unfeasible.<br />
In this talk I will give an overview of the problem of secure management, and present our research effort in defining secure and scalable solutions for managing large IoT deployments. Moreover, I will focus in particular on two important parts of the device management process: (1) software updates distribution; and (2) device's software integrity check.</p>
Tue, 17 Jan 2017 07:56:57 +0000servizio148 at http://dottorato.math.unipd.it