Tomasso Campanella: ¿escolástico o renacentista?

_A partir de una revisión de las ideas de Tomasso Campanella, autor de La ciudad del sol, en este ensayo se argumenta en favor de que el proyecto utópico de este hombre del Renacimiento contiene más rasgos escolásticos y teocráticos que renacentistas

Retórica filosófica y retórica fisiológica

_Se exponen dos tendencias respecto a la concepción de la retórica: la primera se da en torno al planteamiento aristotélico, donde se le considera como una extensión de la filosofía, que se vincula con la dialéctica, la lógica y la ética; la segunda ocurre en torno la la concepción nietzscheana, la cual plantea que la retórica no tiene como fin convencer, sino conmover, además de que se considera que la retórica es la esencia misma del lenguaje, no un ornato

The 3D Dimer and Ising Problems Revisited

We express the finite 3D Dimer partition function as a linear combination of determinants of oriented adjacency matrices, and the finite 3D Ising partition sum as a linear combination of products over aperiodic closed walks. The methodology we use is embedding of cubic lattice on 2D surfaces of large genus

CFT in Conformally Flat Spacetimes

A new class of conformal field theories is presented, where the background gravitational field is conformally flat. Conformally flat (CF) spacetimes enjoy conformal properties quite similar to the ones of flat spacetime. The conformal isometry group is of maximal rank and the conformal Killing vectors in conformally flat coordinates are {\em exactly} the same as the ones of flat spacetime. In this work, a new concept of distance is introduced, the {\em conformal distance}, which transforms covariantly under all conformal isometries of the CF space. It is shown that precisely for CF spacetimes, an adequate power of the said conformal distance is a solution of the non-minimal d'Alembert equation.Comment: Minor changes and some clarifications added. Published version. 16 page

Feminisms and the spacialization of resistances: Keeping the fight alive

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Weyl anomalies and the nature of the gravitational field

The presence of gravity generalizes the notion of scale invariance to Weyl invariance, namely, invariance under local rescalings of the metric. In this work, we have computed the Weyl anomaly for various classically scale or Weyl invariant theories, making particular emphasis on the differences that arise when gravity is taken as a dynamical fluctuation instead of as a non-dynamical background field. We find that the value of the anomaly for the Weyl invariant coupling of scalar fields to gravity is sensitive to the dynamical character of the gravitational field, even when computed in constant curvature backgrounds. We also discuss to what extent those effects are potentially observable.Comment: 37 pages, 1 tabl

Weighing the Vacuum Energy

We discuss the weight of vacuum energy in various contexts. First, we compute the vacuum energy for flat spacetimes of the form $\mathbb{T}^3 \times \mathbb{R}$, where $\mathbb{T}^3$ stands for a general 3-torus. We discover a quite simple relationship between energy at radius $R$ and energy at radius $\frac{l_s^2}{ R}$. Then we consider quantum gravity effects in the vacuum energy of a scalar field in $\mathbb{M}_3 \times S^1$ where $\mathbb{M}_3$ is a general curved spacetime, and the circle $S^1$ refers to a spacelike coordinate. We compute it for General Relativity and generic transverse {\em TDiff} theories. In the particular case of Unimodular Gravity vacuum energy does not gravitate.Comment: 32 pages. Minor correction