A nearly parallel G2-structure on a seven-dimensional Riemannian manifold is equivalent to
a spin structure with a Killing spinor. We prove general results about the automorphism …

M theory compactifications on G2 holonomy manifolds, whilst supersymmetric, require
singularities in order to obtain non-Abelian gauge groups, chiral fermions and other …

In the context of string theory, axions appear to provide the most plausible solution of the
strong CP problem. However, as has been known for a long time, in many string-based …

A bstract We observe a direct relation between the existence of fundamental axionic strings,
dubbed EFT strings, and infinite distance limits in 4d\(\mathcal {N}\)= 1 EFTs coupled to …

The book starts with a thorough introduction to connections and holonomy groups, and to
Riemannian, complex and Kähler geometry. Then the Calabi conjecture is proved and used …

Sasakian manifolds were first introduced in 1962. This book's main focus is on the intricate
relationship between Sasakian and Kähler geometries, especially when the Kähler structure …

Real Killing spinors and holonomy Page 1 Commun. Math. Phys. 154, 509-521 (1993)
Communications in Mathematical Physics 9 Springer-Verlag 1993 Real Killing Spinors and …

We study the spectrum of open strings on AdS2 branes in AdS3 in an NS–NS background,
using the SL (2, R) WZW model. When the brane carries no fundamental string charge, the …

This graduate level text covers an exciting and active area of research at the crossroads of
several different fields in Mathematics and Physics. In Mathematics it involves Differential …

We develop an approach to Khovanov homology of knots via gauge theory (previous
physics-based approaches involved other descriptions of the relevant spaces of BPS states) …