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Collective communication performance is critical in a number of MPI
applications. In this paper we focus on two widely used primitives,
broadcast and reduce, and present experimental results obtained on a cluster
of PC connected by Myrinet.
We compare the performance of the MPICH primitives… |
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In this paper we study several different methods both
deterministic and stochastic to solve the Nuclear Magnetic
Resonance (NMR) relaxometry problem. This
problem is strongly related to finding a non-negative
function given a finite number of values of its
Laplace transform embedded in noise. Some… |
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In this paper we describe how to swap two 2 × 2 blocks in a real Schur form and a generalized real Schur form. We pay special attention to the numerical stability of the method. We also illustrate the stability of our approach by a series of numerical tests. |
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A priori estimates for solutions to homogeneous Neumann problems for uniformly elliptic equa-
tions in open subsets \Omega of IR^n are established when the datum on right-hand side
is in the limiting space L^{n/2}(\Omega), or, more generally, in the Lorentz spaces
L^{n/2, q}(\Omega). These… |
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We study the rate of weak convergence of Markov chains to diffusion processes under quite general assumptions. We give an example in the financial framework, applying the convergence analysis to a multiple jumps tree approximation of the CIR process. Then, we combine the Markov chain approach with… |
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A major neglected weakness of many ecological models is the numerical method used to solve the governing systems of differential equations. Indeed, the discrete dynamics described by numerical integrators can provide spurious solution of the corresponding continuous model. The approach represented… |
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Background: Pathological angiogenesis represents a critical issue in the progression of many diseases. Down syndrome is postulated to be a systemic anti-angiogenesis disease model, possibly due to increased expression of anti-angiogenic regulators on chromosome 21. The aim of our study was to… |
