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- W2938365008 abstract "Abstract We study approximations of eigenvalue problems for integral operators associated with kernel functions of exponential type. We show convergence rate <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:mrow> <m:mrow> <m:mo fence=true stretchy=false>|</m:mo> <m:mrow> <m:msub> <m:mi>λ</m:mi> <m:mi>k</m:mi> </m:msub> <m:mo>-</m:mo> <m:msub> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> </m:msub> </m:mrow> <m:mo fence=true stretchy=false>|</m:mo> </m:mrow> <m:mo>≤</m:mo> <m:mrow> <m:msub> <m:mi>C</m:mi> <m:mi>k</m:mi> </m:msub> <m:mo></m:mo> <m:msup> <m:mi>h</m:mi> <m:mn>2</m:mn> </m:msup> </m:mrow> </m:mrow> </m:math> {lvertlambda_{k}-lambda_{k,h}rvertleq C_{k}h^{2}} in the case of lowest order approximation for both Galerkin and Nyström methods, where h is the mesh size, <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:msub> <m:mi>λ</m:mi> <m:mi>k</m:mi> </m:msub> </m:math> {lambda_{k}} and <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:msub> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> </m:msub> </m:math> {lambda_{k,h}} are the exact and approximate k th largest eigenvalues, respectively. We prove that the two methods are numerically equivalent in the sense that <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:mrow> <m:mrow> <m:mo stretchy=false>|</m:mo> <m:mrow> <m:msubsup> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> <m:mrow> <m:mo stretchy=false>(</m:mo> <m:mi>G</m:mi> <m:mo stretchy=false>)</m:mo> </m:mrow> </m:msubsup> <m:mo>-</m:mo> <m:msubsup> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> <m:mrow> <m:mo stretchy=false>(</m:mo> <m:mi>N</m:mi> <m:mo stretchy=false>)</m:mo> </m:mrow> </m:msubsup> </m:mrow> <m:mo stretchy=false>|</m:mo> </m:mrow> <m:mo>≤</m:mo> <m:mrow> <m:mi>C</m:mi> <m:mo></m:mo> <m:msup> <m:mi>h</m:mi> <m:mn>2</m:mn> </m:msup> </m:mrow> </m:mrow> </m:math> {|lambda^{(G)}_{k,h}-lambda^{(N)}_{k,h}|leq Ch^{2}} , where <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:msubsup> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> <m:mrow> <m:mo stretchy=false>(</m:mo> <m:mi>G</m:mi> <m:mo stretchy=false>)</m:mo> </m:mrow> </m:msubsup> </m:math> {lambda^{(G)}_{k,h}} and <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:msubsup> <m:mi>λ</m:mi> <m:mrow> <m:mi>k</m:mi> <m:mo>,</m:mo> <m:mi>h</m:mi> </m:mrow> <m:mrow> <m:mo stretchy=false>(</m:mo> <m:mi>N</m:mi> <m:mo stretchy=false>)</m:mo> </m:mrow> </m:msubsup> </m:math> {lambda^{(N)}_{k,h}} denote the k th largest eigenvalues computed by Galerkin and Nyström methods, respectively, and C is a eigenvalue independent constant. The theoretical results are accompanied by a series of numerical experiments." @default.
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- W2938365008 date "2019-04-06" @default.
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- W2938365008 title "Eigenvalue Problems for Exponential-Type Kernels" @default.
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- W2938365008 doi "https://doi.org/10.1515/cmam-2018-0186" @default.
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