Young Measures on Topological Spaces - Mathematics and Its Applications - Charles Castaing - Books - Springer - 9789048165520 - December 4, 2010
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Young Measures on Topological Spaces - Mathematics and Its Applications Softcover Reprint of the Original 1st Ed. 2004 edition

Charles Castaing

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Young Measures on Topological Spaces - Mathematics and Its Applications Softcover Reprint of the Original 1st Ed. 2004 edition

Classicalexamples of moreand more oscillatingreal?valued functions on a domain N ?of R are the functions u (x)=sin(nx) with x=(x ,..., x ) or the so-called n 1 1 n n+1 Rademacherfunctionson]0,1[, u (x)=r (x) = sgn(sin(2 ?x))(seelater3.1.4). n n They may appear as the gradients?v of minimizing sequences (v ) in some n n n?N variationalproblems. Intheseexamples, thefunctionu convergesinsomesenseto n ameasure µ on ? ×R, called Young measure. In Functional Analysis formulation, this is the narrow convergence to µ of the image of the Lebesgue measure on ? by ? ? (?, u (?)). In the disintegrated form (µ ) , the parametrized measure µ n ? ??? ? captures the possible scattering of the u around ?. n Curiously if (X ) is a sequence of random variables deriving from indep- n n?N dent ones, the n-th one may appear more and more far from the k ?rst ones as 2 if it was oscillating (think of orthonormal vectors in L which converge weakly to 0). More precisely when the laws L(X ) narrowly converge to some probability n measure , it often happens that for any k and any A in the algebra generated by X ,..., X , the conditional law L(X|A) still converges to (see Chapter 9) 1 k n which means 1 ??? C (R) ?(X (?)) dP(?)?? ?d b n P(A) A R or equivalently, ? denoting the image of P by ? ? (?, X (?)), n X n (1l ??) d? ?? (1l ??) d[P? ].


320 pages, biography

Media Books     Paperback Book   (Book with soft cover and glued back)
Released December 4, 2010
ISBN13 9789048165520
Publishers Springer
Pages 320
Dimensions 155 × 235 × 17 mm   ·   471 g
Language English  

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