13.07.2015 Views

Mathematical Methods for Physics and Engineering - Matematica.NET

Mathematical Methods for Physics and Engineering - Matematica.NET

Mathematical Methods for Physics and Engineering - Matematica.NET

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

PDES: GENERAL AND PARTICULAR SOLUTIONS20.23 (a) Parabolic, open, Dirichlet u(x, 0) given, Neumann ∂u/∂x =0atx = ±L/2<strong>for</strong> all t;(b) elliptic, closed, Dirichlet;(c) elliptic, closed, Neumann ∂u/∂n = σ/ɛ 0 ;(d) hyperbolic, open, Cauchy.20.25 Follow an argument similar to that in section 20.7 <strong>and</strong> argue that the additionalterm ∫ m 2 |w| 2 dV must be zero, <strong>and</strong> hence that w = 0 everywhere.712

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!