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248 papers · 1 filter
A note on Stein fillings of contact manifolds
Anar Akhmedov, John B. Etnyre, Thomas E. Mark +1
In this note we construct infinitely many distinct simply connected Stein fillings of a certain infinite family of contact 3--manifolds.
The Origin and Control of the Sources of AMR in (Ga,Mn)As Devices
A. W. Rushforth, K. Výborný, C. S. King +11
We present details of our experimental and theoretical study of the components of the anisotropic magnetoresistance (AMR) in (Ga,Mn)As. We develop experimental methods to yield dir…
Different approaches to the second order Klein-Gordon equation
Karim A. Malik, David Seery, Kishore N. Ananda
We derive the Klein--Gordon equation for a single scalar field coupled to gravity at second order in perturbation theory and leading order in slow-roll. This is done in two ways: w…
Infinite-Dimensional Symmetries of Two-Dimensional Coset Models Coupled to Gravity
M. J. Perry, H. Lu, C. N. Pope
In an earlier paper we studied the infinite-dimensional symmetries of symmetric-space sigma models (SSMs) in a flat two-dimensional spacetime. Here, we extend our investigation to…
On the Physical Significance of Infra-red Corrections to Inflationary Observables
N. Bartolo, S. Matarrese, M. Pietroni +2
Inflationary observables, like the power spectrum, computed at one- and higher-order loop level seem to be plagued by large infra-red corrections. In this short note, we point out…
Deformations of Compact Coassociative 4-folds with Boundary
Alexei Kovalev, Jason D. Lotay
Coassociative 4-folds are a particular class of 4-dimensional submanifolds which are defined in a 7-dimensional manifold M with a G_2 structure given by a `positive' differential 3…