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We present a direct approach for proving convergence in measure/product capacity of multivariate, nonhomogeneous, Padé approximants. Previous approaches have involved projection onto Padé-type approximation in one variable, and only yielded convergence in (Lebesgue) measure. 相似文献
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LetGbe a connected compact type Lie group equipped with anAdG-invariant inner product on the Lie algebra ofG. Given this data there is a well known left invariant “H1-Riemannian structure” on =(G)—the infinite dimensional group of continuous based loops inG. Using this Riemannian structure, we define and construct a “heat kernel”νT(g0, ·) associated to the Laplace–Beltrami operator on (G). HereT>0,g0∈(G), andνT(g0,·) is a certain probability measure on (G). For fixedg0∈(G) andT>0, we use the measureνT(g0,·) and the Riemannian structure on (G) to construct a “classical” pre-Dirichlet form. The main theorem of this paper asserts that this pre-Dirichlet form admits a logarithmic Sobolev inequality. 相似文献
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Heyduk AF Driver TG Labinger JA Bercaw JE 《Journal of the American Chemical Society》2004,126(46):15034-15035
Anhydrous cationic Pt(II) complexes [(NN)Pt(CH3)(CF3CD2OD)]+ (1, NN = ArN=C(Me)-C(Me)=NAr), which are obtained by reaction of (NN)Pt(CH3)2 with B(C6F5)3 in CF3CD2OD, activate C-H bonds of benzene and methylbenzenes, with enhanced reactivity compared to the previously prepared equilibrium mixtures with the (thermodynamically favored) aquo complexes. For methylbenzenes (toluene, p-xylene, mesitylene), activation at the aromatic and benzylic positions are kinetically competitive, but the product of the latter is strongly favored thermodynamically. This unusual trend is attributed to formation of eta3-benzyl structures, which can be observed spectroscopically for 1,4-diethylbenzene activation. 相似文献
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We use mixed three term recurrence relations typically satisfied by classical orthogonal polynomials from sequences corresponding to different parameters to derive upper (lower) bounds for the smallest (largest) zeros of Jacobi, Laguerre and Gegenbauer polynomials. 相似文献
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Back Cover: Synthesis and Properties of Semiconducting Bispyrrolothiophenes for Organic Field‐Effect Transistors (Chem. Eur. J. 20/2014)
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