3,753 research outputs found
Recursion operators of the N=2 supersymmetric unconstrained matrix GNLS hierarchies
A super-algebraic formulation of the N=2 supersymmetric unconstrained matrix
(k|n,m)-MGNLS hierarchies (nlin.SI/0201026) is established. Recursion
operators, fermionic and bosonic symmetries as well as their superalgebra are
constructed for these hierarchies.Comment: 9 page
The Full Structure of Quantum Super- Algebra
We present the complete structure of the nonlinear super extension of
Polyakov-Bershadsky, , algebra with the generic central charge, ,
at the {\it quantum} level. It contains extra two pairs of fermionic currents
with integer spins 1 and 2, besides the currents of superconformal and
algebras. For limit, the algebra reduces to
the classical one, which has been studied previously. The 'hybrid' field
realization of this algebra is also discussed.Comment: 8 pages, latex, no figure
Evaluating Cache Coherent Shared Virtual Memory for Heterogeneous Multicore Chips
The trend in industry is towards heterogeneous multicore processors (HMCs),
including chips with CPUs and massively-threaded throughput-oriented processors
(MTTOPs) such as GPUs. Although current homogeneous chips tightly couple the
cores with cache-coherent shared virtual memory (CCSVM), this is not the
communication paradigm used by any current HMC. In this paper, we present a
CCSVM design for a CPU/MTTOP chip, as well as an extension of the pthreads
programming model, called xthreads, for programming this HMC. Our goal is to
evaluate the potential performance benefits of tightly coupling heterogeneous
cores with CCSVM
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