117 citations · 1.6k across the 133 of their papers we have counts for
8 papers · 1 filter
Lift of fractional D-brane charge to equivariant Cohomotopy theory
Simon Burton, Hisham Sati, Urs Schreiber
The lift of K-theoretic D-brane charge to M-theory was recently hypothesized to land in Cohomotopy cohomology theory. To further check this "Hypothesis H", here we explicitly compu…
Topological actions via gauge variations of higher structures
Hisham Sati, Matthew Wheeler
In this note we provide a new perspective on the topological parts of several action functionals in string and M-theory. We show that rationally these can be viewed as large gauge…
Differential KO-theory: constructions, computations, and applications
Daniel Grady, Hisham Sati
We provide several constructions in differential KO-theory. First, we construct a differential refinement of the -genus and a pushforward leading to a Riemann-Roch theorem…
Gauge enhancement of super M-branes via parametrized stable homotopy theory
Vincent Braunack-Mayer, Hisham Sati, Urs Schreiber
A key open problem in M-theory is the mechanism of "gauge enhancement", which supposedly makes M-branes exhibit the nonabelian gauge degrees of freedom that are seen perturbatively…
Real ADE-equivariant (co)homotopy and Super M-branes
John Huerta, Hisham Sati, Urs Schreiber
A key open problem in M-theory is the identification of the degrees of freedom that are expected to be hidden at ADE-singularities in spacetime. Comparison with the classification…
Higher T-duality in M-theory via local supersymmetry
Hisham Sati, Urs Schreiber
By analyzing super-torsion and brane super-cocycles, we derive a new duality in M-theory, which takes the form of a higher version of T-duality in string theory. This involves a ne…
Higher T-duality of super M-branes
Domenico Fiorenza, Hisham Sati, Urs Schreiber
We establish a higher generalization of super L-infinity-algebraic T-duality of super WZW-terms for super p-branes. In particular, we demonstrate spherical T-duality of super M5-br…
T-duality in rational homotopy theory via -algebras
Domenico Fiorenza, Hisham Sati, Urs Schreiber
We combine Sullivan models from rational homotopy theory with Stasheff's -algebras to describe a duality in string theory. Namely, what in string theory is known as topol…