Authors: Ron Donagi Martijn Wijnholt
Publish Date: 2013/05/14
Volume: 2013, Issue: 5, Pages: 68-
Abstract
We consider several aspects of holomorphic brane configurations We recently showed that an important part of the defining data of such a configuration is the gluing morphism which specifies how the constituents of a configuration are glued together but is usually assumed to be vanishing Here we explain the rules for computing spectra and interactions for configurations with nonvanishing gluing VEVs We further give a detailed discussion of the Dterms for Higgs bundles spectral covers and ALE fibrations We highlight a stability criterion that applies to degenerate configurations of the spectral data and address an apparent discrepancy between the field theory and ALE descriptions This allows us to show that one gets walls of marginal stability in F theory even though they are absent in the 11d supergravity description We also propose a numerical approach for approximating the hermitianEinstein metric of the Higgs bundle using balanced metrics
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