نتایج جستجو برای: null point

تعداد نتایج: 567690  

2015
B. W. Shanahan B. D. Dudson F. Avino I. Furno P. Hill A. Fasoli

Introduction Filaments, or blobs, are field aligned plasma structures which have been observed in the scrape of layer of magnetically confined plasmas. These filaments carry particles into the SOL and therefore play a role in determining the profiles during L-mode and inter-ELM H-mode scenarios. While there have been many investigations into the dynamics of such filaments [1, 2], few have conce...

Journal: :SIAM J. Matrix Analysis Applications 2016
Jennifer Pestana Tyrone Rees

We will present theory that underpins the use of null-space preconditioners, giving eigenvalue bounds that show that the eigenvalues of the preconditioned system are clustered when a good approximation to the null-space matrix can be found. Additionally, we will describe how two of the family of preconditioners, although indefinite and non-symmetric, can be applied with a Krylov method with a s...

Journal: :Applied Mathematics & Information Sciences 2014

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