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E-International Scientific Research JournalISSN: 2094-1749 Volume: 2 Issue: 4, 2010Here, r denotes <strong>the</strong> distance from <strong>the</strong> centre of <strong>the</strong> sp<strong>here</strong>. In <strong>the</strong>se relations, and are <strong>the</strong>scaling dimensions of fields and(5)With <strong>the</strong> space dimension d, and and are <strong>the</strong> standard critical exponents of Ising-likemagnetic systems [40,41]. Using an adequate special conformal transformation, it was found[18,19] that <strong>the</strong> profiles relative to <strong>the</strong> one-sp<strong>here</strong> problem may be related to those in a halfspacebyw<strong>here</strong> z is <strong>the</strong> perpendicular distance, and and are those amplitudes appearing in Eqs.(4a) and (4b). This means that, for <strong>the</strong> determination of <strong>the</strong> value of <strong>the</strong>se amplitudes, it will besufficient to consider a polymer mixture occupying a semi-infinite space limited by a planesurface. On <strong>the</strong> o<strong>the</strong>r hand, and are <strong>the</strong> amplitudes, at small-distances compared to <strong>the</strong>bulk correlation length ξ, of <strong>the</strong> (connected) two-point correlation functions,(The subscripts b is for bulk and c for connected).We recall that, as demonstrated by de Gennes [54,57], <strong>the</strong> polymer mixtures can becorrectly described using mean-field <strong>the</strong>ory. This is true only for those polymer mixtures ofhigh-molecular-weight. Indeed, <strong>the</strong> critical region around <strong>the</strong> critical point, w<strong>here</strong> a non-320

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