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On the composition of the integral and derivative operators of functional order

Silvia I. Hartzstein, Beatriz E. Viviani (2003)

Commentationes Mathematicae Universitatis Carolinae

The Integral, I φ , and Derivative, D φ , operators of order φ , with φ a function of positive lower type and upper type less than 1 , were defined in [HV2] in the setting of spaces of homogeneous-type. These definitions generalize those of the fractional integral and derivative operators of order α , where φ ( t ) = t α , given in [GSV]. In this work we show that the composition T φ = D φ I φ is a singular integral operator. This result in addition with the results obtained in [HV2] of boundedness of I φ and D φ or the T 1 -theorems proved...

On the computation of scaling coefficients of Daubechies' wavelets

Dana Černá, Václav Finěk (2004)

Open Mathematics

In the present paper, Daubechies' wavelets and the computation of their scaling coefficients are briefly reviewed. Then a new method of computation is proposed. This method is based on the work [7] concerning a new orthonormality condition and relations among scaling moments, respectively. For filter lengths up to 16, the arising system can be explicitly solved with algebraic methods like Gröbner bases. Its simple structure allows one to find quickly all possible solutions.

On the conjecture of Gát.

Goginava, Ushangi (2004)

Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]

On the convergence of moments in the CLT for triangular arrays with an application to random polynomials

Christophe Cuny, Michel Weber (2006)

Colloquium Mathematicae

We give a proof of convergence of moments in the Central Limit Theorem (under the Lyapunov-Lindeberg condition) for triangular arrays, yielding a new estimate of the speed of convergence expressed in terms of νth moments. We also give an application to the convergence in the mean of the pth moments of certain random trigonometric polynomials built from triangular arrays of independent random variables, thereby extending some recent work of Borwein and Lockhart.

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