Derivación numérica: aplicación ao deseño de esquemas de diferenzas finitas para a resolución de EDP
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Neste traballo abordaranse os aspectos básicos da aproximación de derivadas mediante fórmulas numéricas, empregando unha coñecida expresión do erro para demostrar a inexistencia de fórmulas de Gauss en derivación numérica e establecer condicións necesarias e suficientes para a superexactitude dunha fórmula. Verase despois que con ese coñecemento se poden deseñar facilmente métodos de diferenzas finitas para a resolución de ecuacións en derivadas parciais. Este TFG require programación en MATLAB.
In this paper the basics of approximating derivatives by numerical formulae are addressed, using a well-known error expression in order to prove the non-existence of Gaussian formulae in numerical differentiation and establishing necessary and sufficient conditions for the superexactness of a formula. Later on, with the compilation of the previously obtained knowledge, finite difference methods can be easily designed for solving partial differential equations. Programming in MATLAB will be involved.
In this paper the basics of approximating derivatives by numerical formulae are addressed, using a well-known error expression in order to prove the non-existence of Gaussian formulae in numerical differentiation and establishing necessary and sufficient conditions for the superexactness of a formula. Later on, with the compilation of the previously obtained knowledge, finite difference methods can be easily designed for solving partial differential equations. Programming in MATLAB will be involved.
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