Prossimi Seminari

Lunedì 22 Ott ore 20:30
presso Cinema Perla, via san Donato 34 - Bologna
seminario interdisciplinare
tra circa 18 ore
La laurea in matematica e il mondo del lavoro
Tiziana Primori
Nell'ambito della rassegna Scienza al Cinema la dott. Tiziana Primori, laureata in matematica e amministratore delegato di Eataly World, commentera' il film "Il diritto di contare", parlando delle possibilità professionali offerte dalla laurea in matematica, in particolare alle donne.
Martedì 23 Ott ore 08:00
presso - Aula Da Stabilire -
Fano and IHS manifolds
Enrico Fatighenti
Seminario riservato al gruppo di ricerca su varietà di Fano e IHS.
Mercoledì 24 Ott ore 14:30
presso Aula Vitali
seminario di storia della matematica
MARIA GAETANA AGNESI: un trattato di matematica "ad uso della gioventù"
Raffaella Simili - Clara Silvia Roero - Alberto Parmeggiani - Miriam Focaccia
Raffaella Simili : Donne e scienza: una storia da fare? Clara Silvia Roero: Il successo europeo delle "Instituzioni analitiche" di M.G. Agnesi Alberto Parmeggiani: La “versiera” di Maria Gaetana Agnesi Miriam Focaccia: Bologna nel Settecento: un paradiso per le donne
Venerdì 26 Ott ore 14:30
presso Seminario II
seminario di algebra e geometria
nell'ambito della serie
Seminario di Algebra
The essential skeletons of pairs and the geometric P=W conjecture
Mirko Mauri
The geometric P=W conjecture is a conjectural description of the asymptotic behavior of the celebrated Nonabelian Hodge correspondence. In particular, it is expected that the dual boundary complex of the compactification of character varieties has the homotopy type of a sphere. In a joint work with Enrica Mazzon and Matthew Stevenson, we compute the first non-trivial examples of these dual boundary complexes in the compact case. This requires to develop a new theory of essential skeletons over a trivially-valued field. As a byproduct, inspired by these constructions, we show that certain character varieties appear in degenerations of compact hyperkähler manifolds. In this talk I will explain how these new non-archimedean techniques can shed new light into classical algebraic geometry problems.
Martedì 06 Nov ore 11:30
presso Aula Arzelà
seminario interdisciplinare
Solving Mixed Integer Linear Problems with CPLEX/OPL - Parte I
Roberto Roberti
Optimization Programming Language (OPL) is a powerful, yet intuitive programming language that allows to solve Mixed Integer Linear Problems (MILP) via ILOG CPLEX - one of the most performing general-purpose MILP solvers available on the market. OPL allows to efficiently solve a wide variety of MILP involving thousands of variables and constraints within reasonable computing times. In this series of two seminars, we will show how some classical combinatorial optimization problems (e.g., Traveling Salesman Problem, Generalized Assignment Problem, etc) can be formulated and solved in OPL.
Giovedì 08 Nov ore 16:30
presso Aula Vitali
seminario di analisi matematica
On s-harmonic functions on cones
Stefano Vita
We deal with non negative s-harmonic functions in a cone C of R^n (with vertex at the origin), which satisfy 0-Dirichlet boundary conditions in the complement of the cone. We consider the case when $s$ approaches $1$, wondering whether solutions of the problem do converge to harmonic functions in the same cone or not. Surprisingly, the answer will depend on the opening of the cone through an auxiliary eigenvalue problem on the upper half sphere. These conic functions are involved in the study of the nodal regions in the case of optimal partitions and other free boundary problems and play a crucial role in the extension of the Alt-Caffarelli-Friedman monotonicity formula to the case of fractional diffusions.
Venerdì 09 Nov ore 11:00
presso Aula Arzelà
seminario interdisciplinare
Solving Mixed Integer Linear Problems with CPLEX/OPL - Parte II
Roberto Roberti
Optimization Programming Language (OPL) is a powerful, yet intuitive programming language that allows to solve Mixed Integer Linear Problems (MILP) via ILOG CPLEX - one of the most performing general-purpose MILP solvers available on the market. OPL allows to efficiently solve a wide variety of MILP involving thousands of variables and constraints within reasonable computing times. In this series of two seminars, we will show how some classical combinatorial optimization problems (e.g., Traveling Salesman Problem, Generalized Assignment Problem, etc) can be formulated and solved in OPL.
Giovedì 06 Dic ore 14:30
presso Seminario II
seminario di algebra e geometria
Asymptotic behavior of Linear and Integer Programming and the stability of the Castelnuovo-Mumford regularity
Le Tuan Hoa
In this talk I will explain a connection between Commutative Algebra and Linear and Integer Programming. In the first part, it is explained how one can translate the problem of bounding the index of stability of the Castelnuovo-Mumford regularities of the integral closures of powers of a monomial ideal into an Integer Linear Programming. The second part is devoted to the asymptotic behavior of Linear and Integer Programming with a fixed cost linear functional and the constraint sets consisting of a finite system of linear equations or inequalities with integral coefficients depending linearly on $n$. It is shown that the optima of such Linear Programming problems are a linear function of $n$, while the optima of the corresponding Integer Programming problems are a quasi-linear function of $n$, provided $n\gg 0$. In the last part I give bounds on the indices of stability of the Castelnuovo-Mumford regularities of the integral closures of powers of a monomial ideal and that of symbolic powers of a square-free monomial ideal.