A first course in the numerical analysis of differential - download pdf or read online

By Arieh Iserles

ISBN-10: 0521734908

ISBN-13: 9780521734905

Numerical research provides various faces to the realm. For mathematicians it's a bona fide mathematical conception with an appropriate flavour. For scientists and engineers it's a useful, utilized topic, a part of the traditional repertoire of modelling suggestions. For laptop scientists it's a conception at the interaction of computing device structure and algorithms for real-number calculations. the strain among those standpoints is the motive force of this publication, which provides a rigorous account of the basics of numerical research of either traditional and partial differential equations. The exposition continues a stability among theoretical, algorithmic and utilized elements. This re-creation has been widely up-to-date, and comprises new chapters on rising topic components: geometric numerical integration, spectral equipment and conjugate gradients. different themes lined contain multistep and Runge-Kutta tools; finite distinction and finite parts innovations for the Poisson equation; and quite a few algorithms to resolve huge, sparse algebraic platforms.

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Additional info for A first course in the numerical analysis of differential equations

Example text

3, convergence and reasonable order are far from sufficient for the successful Exercises 31 computation of ODEs. The solution of such stiff equations requires numerical methods with superior stability properties. Much of the discussion of multistep methods centres upon their implementation. The present chapter avoids any talk of implementation issues – solution of the (mostly nonlinear) algebraic equations associated with implicit methods, error and step-size control, the choice of the starting values y1 , y2 , .

2 displays the (natural) logarithm of the error in the numerical solution of the scalar linear equation y = −y + 2e−t cos 2t, 1 1 y(0) = 0 for (in descending order) h = 12 , h = 10 and h = 50 . How well does the plot illustrate our main distinction between Euler’s method and the trapezoidal rule, namely faster decay of the error for the latter? As often in life, information is somewhat obscured by extraneous ‘noise’; in the present case the error oscillates. This can be easily explained by the periodic component of the exact solution y(t) = e−t sin 2t.

What is the mechanism that degrades the numerical solution and renders it so sensitive to small changes in h? 7) in place of the current method would have only made matters worse. 15), say, and with any h > 0 then the norm would tend to zero in tandem with the exact solution. In other words, methods such as BDFs are singled out by a favourable property that makes them the methods of choice for important classes of ODEs. Much more will be said about this in Chapter 4. Comments and bibliography There are several ways of introducing the theory of multistep methods.

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A first course in the numerical analysis of differential equations by Arieh Iserles

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