2002 | OriginalPaper | Buchkapitel
Iterative Techniques for Mixed Methods
verfasst von : Susanne C. Brenner, L. Ridgway Scott
Erschienen in: The Mathematical Theory of Finite Element Methods
Verlag: Springer New York
Enthalten in: Professional Book Archive
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Equations of the form (12.3.1) or (12.5.14) are indefinite and require special care to solve. We will now consider one class of algorithms which involve a penalty method to enforce the second equation in (12.3.1) or (12.5.14). These algorithms transform the linear algebra to positive-definite problems in many cases. Moreover, the number of unknowns in the algebraic system can also be significantly reduced.