117 citations · 1.6k across the 133 of their papers we have counts for
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Twisted topological structures related to M-branes II: Twisted Wu and Wu^c structures
Hisham Sati
Studying the topological aspects of M-branes in M-theory leads to various structures related to Wu classes. First we interpret Wu classes themselves as twisted classes and then def…
On global anomalies in type IIB string theory
Hisham Sati
We study global gravitational anomalies in type IIB string theory with nontrivial middle cohomology. This requires the study of the action of diffeomorphisms on this group. Several…
Topological aspects of the NS5-brane
Hisham Sati
In this note we investigate certain topological aspects of the effective action of the NS5-brane in type IIA string theory. To facilitate the study of the corresponding partition f…
Twisted Morava K-theory and E-theory
Hisham Sati, Craig Westerland
For an integral cohomology class H of degree n+2 on a space X, we define twisted Morava K-theory K(n)(X; H) at the prime 2, as well as an integral analogue. We explore properties o…
Survey of mathematical foundations of QFT and perturbative string theory
Hisham Sati, Urs Schreiber
Recent years have seen noteworthy progress in the mathematical formulation of quantum field theory and perturbative string theory. We give a brief survey of these developments. It…
Constraints on heterotic M-theory from s-cobordism
Hisham Sati
We interpret heterotic M-theory in terms of h-cobordism, that is the eleven-manifold is a product of the ten-manifold times an interval is translated into a statement that the form…
Corners in M-theory
Hisham Sati
M-theory can be defined on closed manifolds as well as on manifolds with boundary. As an extension, we show that manifolds with corners appear naturally in M-theory. We illustrate…