Concept

Groupe algébrique

Publications associées (191)

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Topickr: Flickr Groups and Users Reloaded

Daniel Gatica-Perez, Radu Andrei Negoescu

With the increased presence of digital imaging devices there also came an explosion in the amount of multimedia content available online. Users have transformed from passive consumers of media into content creators. Flickr.com is such an example of an onli ...

ACM2008

Topickr: Flickr Groups and Users Reloaded

Daniel Gatica-Perez, Radu Andrei Negoescu

IDIAP2008

The Case for Structured Random Codes: Beyond Linear Models

Michael Christoph Gastpar

Recent work has shown that for some multi-user networks, carefully controlling the algebraic structure of the coding scheme may be just as useful as selecting the correct input distribution. In particular, for linear channel models, including finite field ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

The algebra of connectors - Structuring interaction in BIP

Joseph Sifakis, Simon Bliudze

We provide an algebraic formalization of connectors in the BIP component framework. A connector relates a set of typed ports. Types are used to describe different modes of synchronization: rendezvous and broadcast, in particular. Connectors on a set of por ...

2008

Some properties of non-positively curved lattices

Nicolas Monod

We announce results on the structure of CAT(0) groups, CAT(0) lattices and of the underlying spaces. Our statements rely notably on a general study of the full isometry groups of proper CAT(0) spaces. Classical statements about Hadamard manifolds are estab ...

2008

The influence of firms on climate policy

This paper presents a new research project of EPFL REME that aims to assess the influence of firms on climate policy. Firms do not form a solid block of opponents to climate policy regulation. As they face different incentives towards climate policy their ...

2008

The influence of firms on climate policy

2008

Division of Labour in Self-Organised Groups

Francesco Mondada, Michael Bonani, Roderich Gross

In social insect colonies, many tasks are performed by higher-order entities, such as groups and teams whose task solving capacities transcend those of the individual participants. In this paper, we investigate the emergence of such higher-order entities u ...

Springer Verlag2008

Property (T) and rigidity for actions on Banach spaces

Nicolas Monod

We study property (T) and the fixed point property for actions on Lp and other Banach spaces. We show that property (T) holds when L2 is replaced by Lp (and even a subspace/quotient of Lp), and that in fact it is independent of 1 ≤ p < ∞. We show that the ...

2007

What static and dynamic properties should slalom skis possess? Judgments by advanced and expert skiers

Michael Herzog, Olaf Blanke, Pierre-Etienne Bourban, Christian Fischer

Flexural and torsional rigidity are important properties of skis. However, the flexural and torsional rigidity that lead to optimal performance remain to be established. In the present study, four pairs of slalom skis that differed in flexural and torsiona ...

Taylor & Francis2007