We propose an equation that describes M2-branes ending on M5-branes, and which generalizes the description of the D1-D3 system via Nahmâ€™s equation. The simplest solution to this equation constructsâ€¦ (More)

I describe a command that simultaneously solves the extended estimating equations estimator for parameters in the link and variance functions along with those of the linear predictor in a generalizedâ€¦ (More)

We argue that two-dimensional (0, 2) gauged linear sigma models are not destabilized by instanton generated world-sheet superpotentials. We construct several examples where we show this to be true.â€¦ (More)

We construct dual descriptions of (0, 2) gauged linear sigma models. In some cases, the dual is a (0, 2) Landau-Ginzburg theory, while in other cases, it is a non-linear sigma model. The duality mapâ€¦ (More)

We propose a manifestly Uâ€“duality invariant modular form for the D4R4 interaction in type IIB string theory compactified on T 2. It receives perturbative contributions upto two loops, andâ€¦ (More)

We consider intersecting D-brane models which have two dimensional chiral fermions localized at the intersections. At weak coupling, the interactions of these fermions are described by generalizedâ€¦ (More)

We consider C/ZN and C/ZN orbifolds of heterotic string theories and ZN orbifolds of AdS3. We study theories with N=2 worldsheet superconformal invariance and construct RG flows. Following Harvey,â€¦ (More)

We describe a method for obtaining relations between higher derivative interactions in supersymmetric effective actions. The method extends to all orders in the momentum expansion. As an application,â€¦ (More)

The modular invariant coefficient of the D2kR4 term in the effective action of type IIB superstring theory is expected to satisfy Poisson equation on the fundamental domain of SL(2, Z). We obtain theâ€¦ (More)

Soils of the 62-cm deep Apollo 16 double drive tube 60013/14 are mature at the top and submature at the bottom. Modal analyses of 5529 grains from the 90-150 micrometers and the 500-1000 micrometersâ€¦ (More)