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Activitats

Computational geometry seminar 19-05-2016

Speaker: Pilar Cano - Universitat Politècnica de Catalunya and Carleton University A rainbow matching in an edge colored hypergraph is a matching such that each pair of its edges have distinct colors. Brualdi, Ryser and Stein conjectured the existence of a partial n-1 Latin transversal in a Latin square n-matrix. This problem can be translated into finding a rainbow matching in a complete bipartite graph. We extend the result of Erds and Spencer on the existence of rainbow matchings in the complete bipartite graph {n,n} to complete r-partite r-uniform graphs, complete bipartite graphs with repeated edges, and d-regular bipartite graphs minus a matching. The results use the Lopsided version of the Local Lovász Lemma.
  • Computational geometry seminar 19-05-2016
  • 2016-05-19T13:15:00+02:00
  • 2016-05-19T14:15:00+02:00
  • Speaker: Pilar Cano - Universitat Politècnica de Catalunya and Carleton University A rainbow matching in an edge colored hypergraph is a matching such that each pair of its edges have distinct colors. Brualdi, Ryser and Stein conjectured the existence of a partial n-1 Latin transversal in a Latin square n-matrix. This problem can be translated into finding a rainbow matching in a complete bipartite graph. We extend the result of Erds and Spencer on the existence of rainbow matchings in the complete bipartite graph {n,n} to complete r-partite r-uniform graphs, complete bipartite graphs with repeated edges, and d-regular bipartite graphs minus a matching. The results use the Lopsided version of the Local Lovász Lemma.

Speaker: Pilar Cano - Universitat Politècnica de Catalunya and Carleton University A rainbow matching in an edge colored hypergraph is a matching such that each pair of its edges have distinct colors. Brualdi, Ryser and Stein conjectured the existence of a partial n-1 Latin transversal in a Latin square n-matrix. This problem can be translated into finding a rainbow matching in a complete bipartite graph. We extend the result of Erds and Spencer on the existence of rainbow matchings in the complete bipartite graph {n,n} to complete r-partite r-uniform graphs, complete bipartite graphs with repeated edges, and d-regular bipartite graphs minus a matching. The results use the Lopsided version of the Local Lovász Lemma.

Quan
19/05/2016 de 13:15 a 14:15 (Europe/Madrid / UTC200)
On
Room S215 Omega Building, Campus Nord UPC (equiv.: Room 215 Floor -2)
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Activities are regularly announced at Link

Propera defensa Pla de Recerca: Margarida Domenech

Estudi i caracterització de solucions per a jocs cooperatius i bicooperatius. Directors: M. Albina Puente del Campo i José Miguel Giménez Padrales dins del Programa de doctorat en Matemàtica Aplicada

Estudi i caracterització de solucions per a jocs cooperatius i bicooperatius. Directors: M. Albina Puente del Campo i José Miguel Giménez Padrales dins del Programa de doctorat en Matemàtica Aplicada

Quan
18/05/2016 des de/d' 10:30" (Europe/Madrid / UTC200)
On
Seminari de l'EPSEM de Manresa
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Conferència: "Matemàtiques i art"

Breu viatge pel món de les proporcions i la geometria, es mostra la matemàtica i l'art com una relació necessària

Breu viatge pel món de les proporcions i la geometria, es mostra la matemàtica i l'art com una relació necessària

Quan
15/05/2016 des de/d' 18:30" (Europe/Madrid / UTC200)
On
Biblioteca Joan Oliva. Plaça de la Vila. Vilanova i la Geltrú
Nom de contacte
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Seminari de Geometria Algebraica UPC-UB: Vladimir Dotsenko

Vladimir Dotsenko (Trinity College Dublin) Combinatorics of associativity, toric varieties and wonderful models

Vladimir Dotsenko (Trinity College Dublin) Combinatorics of associativity, toric varieties and wonderful models

Quan
13/05/2016 de 15:00 a 20:00 (Europe/Madrid / UTC200)
On
Aula B1, Facultat de Matemàtiques-Edifici Històric, Universitat de Barcelona, Gran Via de les Corts Catalanes 585, 08007 Barcelona
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http://www.ub.edu/sga/seminari1516/dotsenko.pdf

2nd BGSMAth Junior Meeting

II BGSMAth Junior Meeting, May 13th, Barcelona, Institut d'Estudis Catalans

II BGSMAth Junior Meeting, May 13th, Barcelona, Institut d'Estudis Catalans

Quan
13/05/2016 de 09:00 a 18:00 (Europe/Madrid / UTC200)
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El II BGSMAth Junior Meeting tindrà lloc el proper divendres 13 de maig i està coorganitzat per Azahara de la Torre (UPC), Carlos Domingo (UB), Isabel Serra (UAB, CRM)

http://www.bgsmath.cat/ii-bgsmath-junior-meeting/

Computational geometry seminar

Title: Illuminating polygons using edge-aligned vertex floodlights Speaker: Carlos Alegría-Galicia, Universidad Nacional Autónoma de México (UNAM) Abstract: Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.
  • Computational geometry seminar
  • 2016-05-12T13:15:00+02:00
  • 2016-05-12T14:15:00+02:00
  • Title: Illuminating polygons using edge-aligned vertex floodlights Speaker: Carlos Alegría-Galicia, Universidad Nacional Autónoma de México (UNAM) Abstract: Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.

Title: Illuminating polygons using edge-aligned vertex floodlights Speaker: Carlos Alegría-Galicia, Universidad Nacional Autónoma de México (UNAM) Abstract: Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.

Quan
12/05/2016 de 13:15 a 14:15 (Europe/Madrid / UTC200)
On
Room S215 Omega Building, Campus Nord UPC (equiv.: Room 215 Floor -2)
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Activities are regularly announced at
http://www-ma2.upc.edu/dccg/upc-seminar-on-computational-geometry/

Reminder: Computational geometry seminar 12-05-2016

Illuminating polygons using edge-aligned vertex floodlights Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.
  • Reminder: Computational geometry seminar 12-05-2016
  • 2016-05-12T13:15:00+02:00
  • 2016-05-12T14:15:00+02:00
  • Illuminating polygons using edge-aligned vertex floodlights Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.

Illuminating polygons using edge-aligned vertex floodlights Consider a simple polygon P with n vertices, a set of n floodlights, and an angle alpha such that, on every vertex of P lies the apex of one floodlight, all the floodlights have aperture alpha, and at least one of the bounding rays of each floodlight is aligned with an edge of P. We study the problem of finding the minimum value of alpha required to cover P. This is a joint work with David Orden, Carlos Seara, and Jorge Urrutia.

Quan
12/05/2016 de 13:15 a 14:15 (Europe/Madrid / UTC200)
On
Room S215 Omega Building, Campus Nord UPC (equiv.: Room 215 Floor -2)
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Activities are regularly announced at Link

Seminari de Geometria Algebraica UPC-UB: Antoine Chambert-Loir

Antoine Chambert-Loir (Université Paris-Diderot/Institut de Mathématiques de Jussieu), A non-archimedian Ax-Lindemann theorem

Antoine Chambert-Loir (Université Paris-Diderot/Institut de Mathématiques de Jussieu), A non-archimedian Ax-Lindemann theorem

Quan
11/05/2016 des de/d' 16:00" (Europe/Madrid / UTC200)
On
Aula B1, Facultat de Matemàtiques-Edifici Històric (UB) Gran Via de Les Corts Catalanes, 585, Barcelona 08007
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Seminari de Geometria Algebraica UPC-UB Link
Antoine Chambert-Loir (Université Paris-Diderot/Institut de Mathématiques de Jussieu)
A non-archimedian Ax-Lindemann theorem Link

Function Spaces Workshop

The Function Spaces Workshop which will take place next week in CRM

The Function Spaces Workshop which will take place next week in CRM

Quan
09/05/2016 des de/d' 11:00" (Europe/Madrid / UTC200)
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Program is available at Link

On May 9-11 from 11.00 to 12.00 the advanced course will be given by Jill Pipher. 

Moreover, Albert Cohen, Wolfgang Dahmen, Ron DeVore, Andreas Seeger, Vladimir Temlyakov, and Tino Ullrich will give lectures from May 30 to June 3, 2016.

Finally, the program of the conference on Harmonic Analysis and Approximation Theory (HAAT 2016), from June 6 to 10, 2016, will be posted very soon. 

Workshop on Avanlanche processes in condensed matter physics and beyond

We would like to inform you that we are organizing a Worshop on Avanlanche processes in condensed matter physics and beyond, which will be held at the CRM (Barcelona), on January 9th to 13th, 2017.

We would like to inform you that we are organizing a Worshop on Avanlanche processes in condensed matter physics and beyond, which will be held at the CRM (Barcelona), on January 9th to 13th, 2017.

Quan
09/05/2016 a 13/05/2016 (Europe/Madrid / UTC200)
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The workshop is the continuation of a series of two previous meetings: “Crackling noise and intermittency in Condensed Matter Link” held in Göttingen (Germany) on May 2013 and “Avalanches in Functional Materials and Geophsyics” held in Cambridge on December 2014. 
Please note that October 2nd, 2016 is the early bird deadline registration (or when seats are filled). 
You can find more information and register at: Link
We hope that this information is of your interest and look forward to having you at the CRM.

Sincerely,

Álvaro Corral (Centre de Recerca Matemàtica) and Eduard Vives (Universitat de Barcelona). Organizing Comitee