J. David Logan's An Introduction to Nonlinear Partial Differential Equations PDF

By J. David Logan

ISBN-10: 0470225955

ISBN-13: 9780470225950

Compliment for the 1st version:

"This e-book is definitely conceived and good written. the writer has succeeded in generating a textual content on nonlinear PDEs that isn't in simple terms particularly readable but additionally available to scholars from assorted backgrounds."
—SIAM Review

A sensible advent to nonlinear PDEs and their real-world applications

Now in a moment variation, this well known e-book on nonlinear partial differential equations (PDEs) includes improved assurance at the crucial themes of utilized arithmetic in an straightforward, hugely readable layout and is obtainable to scholars and researchers within the box of natural and utilized arithmetic. This publication presents a brand new specialize in the expanding use of mathematical functions within the lifestyles sciences, whereas additionally addressing key themes resembling linear PDEs, first-order nonlinear PDEs, classical and susceptible strategies, shocks, hyperbolic platforms, nonlinear diffusion, and elliptic equations. not like similar books that sometimes in simple terms use formal proofs and concept to illustrate effects, An creation to Nonlinear Partial Differential Equations, moment version takes a more effective method of nonlinear PDEs through emphasizing how the consequences are used, why they're very important, and the way they're utilized to genuine problems.

The intertwining dating among arithmetic and actual phenomena is came upon utilizing precise examples of purposes throughout a number of parts comparable to biology, combustion, site visitors circulate, warmth move, fluid mechanics, quantum mechanics, and the chemical reactor concept. New positive factors of the second one version additionally include:

  • Additional intermediate-level workouts that facilitate the improvement of complicated problem-solving skills

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

  • An improved bibliography that allows extra research into really good topics

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

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Additional resources for An Introduction to Nonlinear Partial Differential Equations

Sample text

Z E R. = 0. 2) where uo(z)is a given function. Interpreted physically. the function uo(z)represents a szgnal at time t = 0, and the PDE is the equation that propagates the signal in time. 9 depicts this interpretation. In wave propagation problems. the signal is usually called a wawe or wave profile. 2). 36 1. Introduction t o Partial Differential Equations 1. Exzstence of Solutzons. , continuous. bounded. t)exist for all z E R and t > O? it is called a global solutzon. Sometimes solutions are only local; that is.

11) where uo and u1 are given functions. 6) with f = uo and g = u1. 0 Example. The initial value problem utt + u,, = 0. u(2. 0) 5 E = uo(2). R. t > 0. 4 Initial and Boundary Value Problems is not well-posed because small changes, or perturbations. in the initial data can lead to arbitrarily large changes in the solution (see Exercise 5). 12) is Laplace's equation (with variables x and t. rather than the usual x and y). which is elliptic. In general. initial conditions are not correct for elliptic equations.

T + k ) u(x - c k ; t =~ - for all constants h , k > 0. 4). + 4. , f and g vanish for 1x1 sufficiently large), prove that the solution ~ ( xt ),has compact support in x for each fixed time t . 5. Find the general solution of the PDE x*uxx + 2ztuxt + t2utt = 0 by transforming the equation to canonical form using characteristic coordinates E = t / x , q = t . 6. Let u = u(z,t ) be a solution of the nonlinear equation a ( u x ,U t ) U x x + 2b(ux, Ut)Uxt + c(ux. Ut)Utt < = 0. Prove that 4~ = x. 4, = t , and d satisfies the h e a r PDE a ( [ .

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

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