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Fast and Guaranteed a Posteriori Error Estimator

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    0023010 - MÚ 2006 RIV CZ eng C - Conference Paper (international conference)
    Vejchodský, Tomáš
    Fast and Guaranteed a Posteriori Error Estimator.
    [Rychlý a zaručený aposteriorní odhad chyby.]
    Programs and Algorithms of Numerical Mathematics 12. Praha: Matematický ústav AV ČR, 2004, s. 257-272. ISBN 80-85823-53-5.
    [Programs and Algorithms of Numerical Mathematics 12. Dolní Maxov (CZ), 06.06.2004-11.06.2004]
    R&D Projects: GA ČR GP201/04/P021
    Institutional research plan: CEZ:AV0Z1019905
    Keywords : elliptic problem * a posteriori error estimator * equilibrated residual method
    Subject RIV: BA - General Mathematics

    The equilibrated residual method and the method of hypercircle are popular methods for a posteriori error estimation for linear elliptic problems. Both these methods are intended to produce guaranteed upper bounds of the energy norm of the error, but the equilibrated residual method is guaranteed only theoretically. The disadvantage of the hypercircle method is its globality, hence slowness. The combination of these two methods leads to local, hence fast, and guaranteed a posteriori error estimator.

    Populárními metodami pro aposteriorní odhady chyby v lineárních eliptických úlohách jsou metoda vyvýžených residuí a metoda hyperkruhu. Obě tyto metody mají dávat zaručenou horní mez energetické normy chyby, ovšem metoda vyvážených residuí je zaručená pouze teoreticky. Nevýhodou metody hyperkruhu je její globálnost a tedy pomalost. Kombinace obou metod vede na lokální, tedy rychlý a zaručený aposteriorní odhad chyby.
    Permanent Link: http://hdl.handle.net/11104/0111699

     
     
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