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- W2090581346 abstract "We consider the Cauchy problem for the first and the second order differential equations in Banach and Hilbert spaces with an operator coefficient <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper A left-parenthesis t right-parenthesis> <mml:semantics> <mml:mrow> <mml:mi>A</mml:mi> <mml:mo stretchy=false>(</mml:mo> <mml:mi>t</mml:mi> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> <mml:annotation encoding=application/x-tex>A(t)</mml:annotation> </mml:semantics> </mml:math> </inline-formula> depending on the parameter <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=t> <mml:semantics> <mml:mi>t</mml:mi> <mml:annotation encoding=application/x-tex>t</mml:annotation> </mml:semantics> </mml:math> </inline-formula>. We develop discretization methods with high parallelism level and without accuracy saturation; i.e., the accuracy adapts automatically to the smoothness of the solution. For analytical solutions the rate of convergence is exponential. These results can be viewed as a development of parallel approximations of the operator exponential <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=e Superscript minus t upper A> <mml:semantics> <mml:msup> <mml:mi>e</mml:mi> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mo>−<!-- − --></mml:mo> <mml:mi>t</mml:mi> <mml:mi>A</mml:mi> </mml:mrow> </mml:msup> <mml:annotation encoding=application/x-tex>e^{-tA}</mml:annotation> </mml:semantics> </mml:math> </inline-formula> and of the operator cosine family <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=cosine StartRoot upper A EndRoot t> <mml:semantics> <mml:mrow> <mml:mi>cos</mml:mi> <mml:mo><!-- --></mml:mo> <mml:mrow class=MJX-TeXAtom-ORD> <mml:msqrt> <mml:mi>A</mml:mi> </mml:msqrt> <mml:mi>t</mml:mi> </mml:mrow> </mml:mrow> <mml:annotation encoding=application/x-tex>cos {sqrt {A} t}</mml:annotation> </mml:semantics> </mml:math> </inline-formula> with a constant operator <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper A> <mml:semantics> <mml:mi>A</mml:mi> <mml:annotation encoding=application/x-tex>A</mml:annotation> </mml:semantics> </mml:math> </inline-formula> possessing exponential accuracy and based on the Sinc-quadrature approximations of the corresponding Dunford-Cauchy integral representations of solutions or the solution operators." @default.
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- W2090581346 date "2004-10-27" @default.
- W2090581346 modified "2023-10-18" @default.
- W2090581346 title "Algorithms without accuracy saturation for evolution equations in Hilbert and Banach spaces" @default.
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- W2090581346 doi "https://doi.org/10.1090/s0025-5718-04-01720-x" @default.
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