I propose a controlled approximation to QCD-like theories with massless quarks by employing supersymmetric QCD perturbed anomaly-mediated supersymmetry breaking. They have identical particle contents. Thanks the ultraviolet insensitivity of anomaly mediation, dynamics can be worked out exactly when $m\ensuremath{\ll}\mathrm{\ensuremath{\Lambda}}$, where $m$ is size breaking and $\mathrm{\ensure...

This article analyzes the role that Fernando Ortiz played in articulation of transatlantic intellectual and academic networks between different Latin American countries, these Spain. The community formed first three decades twentieth century, as also did circuits through which knowledge was transmitted; are studied here Ortiz’s correspondence with other thinkers. Studying this intellectuals oft...