We study the effect of a small cutoff epsilon on the velocity of a pulled front in one dimension by means of a variational principle. We obtain a lower bound on the speed dependent on the cutoff, for which the two leading order terms correspond to the Brunet-Derrida expression. To do so we cast a known variational principle for the speed of propagation of fronts in different variables which mak...

We present a solution for the stationary state of an asymmetric exclusion model with sequential update and open boundary conditions. We solve the model exactly for random hopping in both directions by applying a matrix-product formalism which was recently used to solve the model with sublattice-parallel update [1]. It is shown that the matrix-algebra describing the sequential update and sublatt...

Derrida et al. and Schütz and Stinchcombe gave algebraic formulas for the correlation functions of the partially asymmetric simple exclusion process. Here we give a fairly general recipe of how to get these formulas and extend them to the whole time evolution (starting from the generator of the process), for a certain class of interacting systems. We then analyze the algebraic relations obtaine...

RESUMO O artigo propõe uma reflexão sobre o conceito de presença teorizado por Hans Ulrich Gumbrecht a partir do pensamento Heidegger, confrontando-o à filosofia Jacques Derrida, sobretudo em sua desconstrução da metafísica presença. Assim, não se trata rastrear heideggeriana ao longo obra nem defender Derrida das acusações existencialismo linguístico, mas antes demonstrar que, ter Heidegger co...

El objetivo de este artículo es abordar la recepción realizada por Jacques Derrida respecto hospitalidad ética Emmanuel Lévinas, con el fin reevaluar importancia alteridad levinasiana en concepción derrideana diferencia. Para ello, trabajo se divide dos momentos: primero examina aporía deconstrucción que desarrolló Derrida, sobre tensión entre violencia y hospitalidad; segundo, sondea ...