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Inequalities in Mechanics and Physics (Paperback, Softcover reprint of the original 1st ed. 1976)
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Inequalities in Mechanics and Physics (Paperback, Softcover reprint of the original 1st ed. 1976)
Series: Grundlehren der mathematischen Wissenschaften, 219
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1. We begin by giving a simple example of a partial differential
inequality that occurs in an elementary physics problem. We
consider a fluid with pressure u(x, t) at the point x at the
instant t that 3 occupies a region Q oflR bounded by a membrane r
of negligible thickness that, however, is semi-permeable, i. e., a
membrane that permits the fluid to enter Q freely but that prevents
all outflow of fluid. One can prove then (cf. the details in
Chapter 1, Section 2.2.1) that au (aZu azu aZu) (1) in Q, t>o,
-a - du = g du = -a z + -a z + -a z t Xl X X3 z l g a given
function, with boundary conditions in the form of inequalities u(X,
to => au(x, t)/an=O, XEr, (2) u(x, t)=o => au(x, t)/an?: O,
XEr, to which is added the initial condition (3) u(x, O)=uo(x). We
note that conditions (2) are non linear; they imply that, at each
fixed instant t, there exist on r two regions r and n where u(x, t)
=0 and au (x, t)/an = 0, respectively. These regions are not
prescribed; thus we deal with a "free boundary" problem.
General
Imprint: |
Springer-Verlag
|
Country of origin: |
Germany |
Series: |
Grundlehren der mathematischen Wissenschaften, 219 |
Release date: |
November 2011 |
First published: |
1976 |
Authors: |
G Duvant
|
Translators: |
C. W. John
|
Authors: |
J.L. Lions
|
Dimensions: |
244 x 170 x 21mm (L x W x T) |
Format: |
Paperback
|
Pages: |
400 |
Edition: |
Softcover reprint of the original 1st ed. 1976 |
ISBN-13: |
978-3-642-66167-9 |
Categories: |
Books >
Science & Mathematics >
Mathematics >
General
|
LSN: |
3-642-66167-X |
Barcode: |
9783642661679 |
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