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20022009
most citedDark torsion as the cosmic speed-up

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7 papers · 1 filter

cond-mat2002

The evolutionary minority game with local coordination

E. Burgos, Horacio Ceva, R. P. J. Perazzo

We discuss a modification of the Evolutionary Minority Game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be…

physics.ed-ph2002

Generic composition of boosts: an elementary derivation of the Wigner rotation

Rafael Ferraro, Marc Thibeault

Because of its apparent complexity, the discussion of Wigner rotation is usually reduced to the study of Thomas precession, which is too specific a case to allow a deep understandi…

math.AG20021 cited

The computational complexity of the Chow form

Gabriela Jeronimo, Teresa Krick, Juan Sabia +1

We present a bounded probability algorithm for the computation of the Chow forms of the equidimensional components of an algebraic variety. Its complexity is polynomial in the leng…

gr-qc2002

Global phase time and wave function for the Kantowski-Sachs anisotropic universe

Claudio Simeone

A consisten quantization with a clear notion of time and evolution is given for the anisotropic Kantowski-SDachs cosmological model. It is shown that a suitable coordinate choice a…

math.CT2002

On the representation theory of Galois and Atomic Topoi

Eduardo J. Dubuc

We elaborate on the representation theorems of topoi as topoi of discrete actions of various kinds of localic groups and groupoids. We introduce the concept of "proessential point"…

math.KT2002

G-Structure on the cohomology of Hopf algebras

M. Farinati, A. Solotar

We prove that Ext^*_A(k,k) is a Gerstenhaber algebra, where A is a Hopf algebra. In case A=D(H) is the Drinfeld double of a finite dimensional Hopf algebra H, our results implies t…