Download e-book for kindle: An Introduction to Nonlinear Partial Differential Equations by J. David Logan

By J. David Logan

ISBN-10: 0470225955

ISBN-13: 9780470225950

Compliment for the 1st version:

"This ebook is definitely conceived and good written. the writer has succeeded in generating a textual content on nonlinear PDEs that isn't in simple terms rather readable but in addition obtainable to scholars from various backgrounds."
—SIAM Review

A functional creation to nonlinear PDEs and their real-world applications

Now in a moment version, this well known ebook on nonlinear partial differential equations (PDEs) comprises extended assurance at the valuable subject matters of utilized arithmetic in an undemanding, hugely readable layout and is out there to scholars and researchers within the box of natural and utilized arithmetic. This publication offers a brand new specialize in the expanding use of mathematical purposes within the existence sciences, whereas additionally addressing key themes equivalent to linear PDEs, first-order nonlinear PDEs, classical and susceptible ideas, shocks, hyperbolic platforms, nonlinear diffusion, and elliptic equations. in contrast to similar books that usually in basic terms use formal proofs and idea to illustrate effects, An advent to Nonlinear Partial Differential Equations, moment variation takes a simpler method of nonlinear PDEs by means of emphasizing how the consequences are used, why they're vital, and the way they're utilized to genuine problems.

The intertwining dating among arithmetic and actual phenomena is came upon utilizing targeted examples of purposes throughout numerous components resembling biology, combustion, site visitors circulation, warmth move, fluid mechanics, quantum mechanics, and the chemical reactor thought. New beneficial properties of the second one variation additionally include:

  • Additional intermediate-level routines that facilitate the advance of complicated problem-solving skills

  • New purposes within the organic sciences, together with age-structure, trend formation, and the propagation of diseases

  • An improved bibliography that enables extra research into really expert topics

With person, self-contained chapters and a wide scope of assurance that provides teachers the pliability to layout classes to fulfill particular ambitions, An creation to Nonlinear Partial Differential Equations, moment version is a perfect textual content for utilized arithmetic classes on the upper-undergraduate and graduate degrees. It additionally serves as a helpful source for researchers and pros within the fields of arithmetic, biology, engineering, and physics who wish to extra their wisdom of PDEs.

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Additional info for An Introduction to Nonlinear Partial Differential Equations

Sample text

We say that u flows d o w n t h e gradzent. For example, the second law of thermodynamics states that heat behaves in this manner: heat flows from hotter regions to colder regions, and the steeper the temperature distribution curve. the more rapid the flow of heat. As another example. if u represents a concentration of insects, one may observe that insects move from high concentrations to low concentrations with a rate proportional to the concentration gradient. Therefore. we assume the basic constitutive law p(x.

The positive proportionality constant D is called the dzffuszon constant. and it has dimensions [D]= length2/time. 3 Constitutive Relations describes the behavior of many physical and biological systems, and in Chapter 5 we give a supporting argument for it on the basis of a probability model and random walk. 2) give a pair of PDEs for the two unknowns u and 0 . t ) given by ut - Du,, = 0. 3),called the dzffuszon equatzon. governs conservative processes when the flux is specified by Fick‘s law.

X > 0, t E R, u ( 0 , t )= s ( t ) . t E R. 9. Consider the PDE 4u,, + 5uxt + U t t = 2 - U t - u,. Find the characteristic coordinates and graph the characteristic curves in the xt plane. Reduce the equation to canonical form and find the general solution. 10. Classify the PDE xu,, - 4utt = 0. In the case x > 0 find the characteristic coordinates and sketch the characteristics in an appropriate region in the xt plane. 11. Use the separation of variables method to find a series representation of the solution to the following problems: (a) ut = Du,,.

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An Introduction to Nonlinear Partial Differential Equations by J. David Logan


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