32,459 research outputs found
The Breuil-Mezard conjecture for non-scalar split residual representations
We prove the Breuil-Mezard conjecture for split non-scalar residual
representations of Gal(Qp/Qp) by local methods. Combined with the cases
previously proved in [18] and [24], this completes the proof of the conjecture
(when p>3). As a consequence, the local restriction in the proof of the
Fontaine-Mazur conjecture in [18] is removed.Comment: Final version. To appear in Ann. Scient. de l'E.N.
New Identities for small hyperbolic surfaces
Luo and Tan gave a new identity for hyperbolic surfaces with/without geodesic
boundary in terms of dilogarithms of the lengths of simple closed geodesics on
embedded three-holed spheres or one-holed tori. However, the identity was
trivial for a hyperbolic one-holed torus with geodesic boundary. In this paper
we adapt the argument from Luo and Tan to give an identity for hyperbolic tori
with one geodesic boundary or cusp in terms of dilogarithm functions on the set
of lengths of simple closed geodesics on the torus. As a corollary, we are also
able to express the Luo-Tan identity as a sum over all immersed three-holed
spheres which are embeddings when restricted to the interior of .Comment: 11 pages, 4 figure
Periodic subvarieties of a projective variety under the action of a maximal rank abelian group of positive entropy
We determine positive-dimensional G-periodic proper subvarieties of an
n-dimensional normal projective variety X under the action of an abelian group
G of maximal rank n-1 and of positive entropy. The motivation of the paper is
to understand the obstruction for X to be G-equivariant birational to the
quotient variety of an abelian variety modulo the action of a finite group.Comment: Asian Journal of Mathematics (to appear), Special issue on the
occasion of Prof N. Mok's 60th birthda
A new identity for SL(2,C)-characters of the once punctured torus group
We obtain new variations of the original McShane identity for those
SL(2,C)-representations of the once punctured torus group which satisfy the
Bowditch conditions, and also for those fixed up to conjugacy by an Anosov
mapping class of the torus and satisfying the relative Bowditch conditions.Comment: 9 page
TZC: Efficient Inter-Process Communication for Robotics Middleware with Partial Serialization
Inter-process communication (IPC) is one of the core functions of modern
robotics middleware. We propose an efficient IPC technique called TZC (Towards
Zero-Copy). As a core component of TZC, we design a novel algorithm called
partial serialization. Our formulation can generate messages that can be
divided into two parts. During message transmission, one part is transmitted
through a socket and the other part uses shared memory. The part within shared
memory is never copied or serialized during its lifetime. We have integrated
TZC with ROS and ROS2 and find that TZC can be easily combined with current
open-source platforms. By using TZC, the overhead of IPC remains constant when
the message size grows. In particular, when the message size is 4MB (less than
the size of a full HD image), TZC can reduce the overhead of ROS IPC from tens
of milliseconds to hundreds of microseconds and can reduce the overhead of ROS2
IPC from hundreds of milliseconds to less than 1 millisecond. We also
demonstrate the benefits of TZC by integrating with TurtleBot2 that are used in
autonomous driving scenarios. We show that by using TZC, the braking distance
can be shortened by 16% than ROS
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