117 citations · 1.6k across the 133 of their papers we have counts for
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Massey products in differential cohomology via stacks
Daniel Grady, Hisham Sati
We extend Massey products from cohomology to differential cohomology via stacks, organizing and generalizing existing constructions in Deligne cohomology. We study the properties a…
Lie n-algebras of BPS charges
Hisham Sati, Urs Schreiber
We uncover higher algebraic structures on Noether currents and BPS charges. It is known that equivalence classes of conserved currents form a Lie algebra. We show that at least for…
The WZW term of the M5-brane and differential cohomotopy
Domenico Fiorenza, Hisham Sati, Urs Schreiber
We combine rational homotopy theory and higher Lie theory to describe the WZW term in the M5-brane sigma model. We observe that this term admits a natural interpretation as a twist…
String structures associated to indefinite Lie groups
Hisham Sati, Hyung-bo Shim
String structures have played an important role in algebraic topology, via elliptic genera and elliptic cohomology, in differential geometry, via the study of higher geometric stru…