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Activitats

A Theory of Spectral Clustering, Luca Trevisan (UC Berkeley)

Luca Trevisan will give a conference on Spectral Clustering for a wide audience at the Aula Master, Campus Nord.

Luca Trevisan will give a conference on Spectral Clustering for a wide audience at the Aula Master, Campus Nord.

Quan
21/11/2018 de 15:30 a 16:30 (Europe/Madrid / UTC100)
On
Aula Màster del Campus Nord, UPC
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Spectral clustering algorithms find clusters in a given network by exploiting properties of the eigenvectors of matrices associated with the network. As a first step, one computes a spectral embedding, that is a mapping of nodes to points in a low-dimensional real space; then one uses geometric clustering algorithms such as k-means to cluster the points corresponding to the nodes.

Such algorithms work so well that, in certain applications unrelated to network analysis, such as image segmentation, it is useful to associate a network to the data, and then apply spectral clustering to the network. In addition to its application to clustering, spectral embeddings are a valuable tool for dimension-reduction and data visualization. The performance of spectral clustering algorithms has been justified rigorously when applied to networks coming from certain probabilistic generative models.

A more recent development, which is the focus of this lecture, is a worst-case analysis of spectral clustering, showing that, for every graph that exhibits a certain cluster structure, such structure can be found by geometric algorithms applied to a spectral embedding. Such results generalize the graph Cheeger’s inequality (a classical result in spectral graph theory), and they have additional applications in computational complexity theory and in pure mathematics.

Biosketch

Luca Trevisan is a professor of electrical engineering and computer sciences at U.C. Berkeley and a senior scientist at the Simons Institute for the Theory of Computing. Luca studied at the Sapienza University of Rome, he was a post-doc at MIT and at DIMACS, and he was on the faculty of Columbia University, U.C. Berkeley, and Stanford, before returning to Berkeley in 2014. Luca’s research is in theoretical computer science, and it is focused on computational complexity and graph algorithms. Luca received the STOC’97 Danny Lewin (best student paper) award, the 2000 Oberwolfach Prize, and the 2000 Sloan Fellowship. He was an invited speaker at the 2006 International Congress of Mathematicians.

8a sessió Seminari Contextualització de Matemàtiques

M. Casafont, M. Ferrer i M. Pastor. (Departament de Resistència de Materials i Estructures a l'Enginyeria). Aplicacions matemàtiques a l'Elasticitat i Resistència de Materials.

M. Casafont, M. Ferrer i M. Pastor. (Departament de Resistència de Materials i Estructures a l'Enginyeria). Aplicacions matemàtiques a l'Elasticitat i Resistència de Materials.

Quan
07/11/2018 de 12:00 a 13:30 (Europe/Madrid / UTC100)
On
Aula 002 FME
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MATRIX Conference 2018

International Conference of Math museums and dissemination centers: MATRIX = Mathematics Awareness, Training, Resource & Information eXchange.

International Conference of Math museums and dissemination centers: MATRIX = Mathematics Awareness, Training, Resource & Information eXchange.

Quan
29/10/2018 a 31/10/2018 (Europe/Madrid / UTC100)
On
Museu Agbar (Cornellà de Llobregat) i Cosmocaixa (Barcelona)
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Programa, inscripció i més informació a: https://matrix2018861590936.wordpress.com/

Eva Miranda al BCNspiracy

Eva Miranda convidada a la taula rodona a BCNspiracy hablando de Ciencia al CosmoCaixa el 27 d'Octubre.

Eva Miranda convidada a la taula rodona a BCNspiracy hablando de Ciencia al CosmoCaixa el 27 d'Octubre.

Quan
27/10/2018 de 10:00 a 20:00 (Europe/Madrid / UTC200)
On
CosmoCaixa Barcelona
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BCNspiracy, un esdeveniment estatal de divulgació científica, amb seu a Barcelona.

BCNspiracy neix amb la missió de transmetre la necessitat i la utilitat de la ciència, explicar-la de manera senzilla, assequible i interessant.

Dintre de les activitats previstes hi ha una taula rodona de Dones Científiques moderada per Pere Estupinyà on parlarà Eva Miranda del departament.

Seminari de Geometria Algebraica UB-UPC-UAB, Francisco Presas (ICMAT, Madrid)

Seminari de Geometria Algebraica UB-UPC-UAB, Francisco Presas (ICMAT, Madrid).

Seminari de Geometria Algebraica UB-UPC-UAB, Francisco Presas (ICMAT, Madrid).

Quan
26/10/2018 de 15:00 a 17:00 (Europe/Madrid / UTC200)
On
Aula T2, FMI-UB-Edifici Històric, Gran Via de Les Corts Catalanes, 585, Barcelona 08007
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Computational Geometry Seminar

UPC Research Group on Discrete, Combinatorial and Computational Geometry.

UPC Research Group on Discrete, Combinatorial and Computational Geometry.

Quan
26/10/2018 de 12:15 a 13:15 (Europe/Madrid / UTC200)
On
Room S215 Omega Building, Campus Nord UPC
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Computational Geometry Seminar

Separating a polyhedron from its single-part mold: Optimal algorithms. Speaker: Dan Halperin

Separating a polyhedron from its single-part mold: Optimal algorithms. Speaker: Dan Halperin

Quan
19/10/2018 de 12:15 a 13:15 (Europe/Madrid / UTC200)
On
Room S215 Omega Building, Campus Nord UPC
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7a sessió Seminari Contextualització de Matemàtiques, a càrrec de Joan Vicenç Gómez: Una proposta per a l'ensenyament de les matemàtiques a enginyeria Informàtica

Quan
16/10/2018 de 12:00 a 13:30 (Europe/Madrid / UTC200)
On
Aula 004 FME
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Programa, inscripció i més informació a: https://fme.upc.edu/ca/la-facultat/activitats/2018-2019/seminari-contextualitzacio-de-les-matematiques-a-les-carreres-tecnologiques-de-la-upc-1/Programa%20Seminari%20Contextualitzacio%20Mates

6a sessió Seminari de Contextualització de Matemàtiques

A càrrec de Antonio Travieso "Com les eines matemàtiques ajuden a fabricar peces. Casos pràctics"

A càrrec de Antonio Travieso "Com les eines matemàtiques ajuden a fabricar peces. Casos pràctics"

Quan
03/10/2018 de 12:00 a 13:30 (Europe/Madrid / UTC200)
On
Sala Juntes FME
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Més informació aquí

Les formes de les matemàtiques

BGSMath participates in the European Researchers’ Night 2018 with an initiative designed by Marina Garrote and Alessandro Oneto. They will guide us in a mathematical tour in the evocative location of the Dipòsit del Rei Martí, in Barcelona, just next to the Bellesguard Tower, designed by the renowned architect Antoni Gaudí.
  • Les formes de les matemàtiques
  • 2018-09-29T10:00:00+02:00
  • 2018-09-29T16:00:00+02:00
  • BGSMath participates in the European Researchers’ Night 2018 with an initiative designed by Marina Garrote and Alessandro Oneto. They will guide us in a mathematical tour in the evocative location of the Dipòsit del Rei Martí, in Barcelona, just next to the Bellesguard Tower, designed by the renowned architect Antoni Gaudí.

BGSMath participates in the European Researchers’ Night 2018 with an initiative designed by Marina Garrote and Alessandro Oneto. They will guide us in a mathematical tour in the evocative location of the Dipòsit del Rei Martí, in Barcelona, just next to the Bellesguard Tower, designed by the renowned architect Antoni Gaudí.

Quan
29/09/2018 de 10:00 a 16:00 (Europe/Madrid / UTC200)
On
Dipòsit del Rei Martí, c/Bellesguard 14 Barcelona
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There will be an exhibition of a selection of fascinating Imaginary images, spanning from impossible tilings, surfaces and singularities, and the unimaginable projective plane.

Plus, a set of micro-talks on the applications of mathematics to many aspect of our lives: from pictures, to music or evolutionary science, and much more!

Join us for this incredible tour.

Please tell us you are coming: either register or send us an email at communication@bgsmath.cat.

This event will be held in Catalan, Spanish and English and is for all audiences.

The European Researchers’ Night aims to bring researchers closer to the general public and to increase awareness of research and innovation activities, creating an understanding of the impact of researchers’ work on citizen’s daily life, and encouraging young people to embark on research careers.

European Researchers’ Night is an open science event that makes science and the work of scientists familiar to audiences all over Europe. Activities span from the 28th to the 29th of September, night included. Here you can find a list of the activities in Catalonia (Nit de la Recerca).

This event is partly funded with the project 2017SGR932 Geometria de Varietats i Aplicacions.