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Publications (6 of 6) Show all publications
Guariglia, E. & Silvestrov, S. (2017). A functional equation for the Riemann zeta fractional derivative. In: Sivasundaram, S (Ed.), Proceedings of INCPAA 2016, 11th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences: . Paper presented at ICNPAA 2016 World Congress "Mathematical Problems in Engineering, Aerospace and Sciences", La Rochelle, France, 05-08 July 2016. (pp. 020063-1-020063-10). American Institute of Physics (AIP), 1798, Article ID UNSP 020063.
Open this publication in new window or tab >>A functional equation for the Riemann zeta fractional derivative
2017 (English)In: Proceedings of INCPAA 2016, 11th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences / [ed] Sivasundaram, S, American Institute of Physics (AIP), 2017, Vol. 1798, p. 020063-1-020063-10, article id UNSP 020063Conference paper, Published paper (Refereed)
Abstract [en]

In this paper a functional equation for the fractional derivative of the Riemann zeta function is presented. The fractional derivative of the zeta function is computed by a generalization of the Grunwald-Letnikov fractional operator, which satisfies the generalized Leibniz rule. It is applied to the asymmetric functional equation of the Rieman zeta function in order to obtain the result sought. Moreover, further properties of this fractional derivative are proposed and discussed.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017
Keywords
Riemann zeta function, generalized Grunwald-Letnikov fractional derivative, generalized Leibniz rule, functional equation.
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33255 (URN)10.1063/1.4972655 (DOI)000399203000063 ()2-s2.0-85013642866 (Scopus ID)9780735414648 (ISBN)
Conference
ICNPAA 2016 World Congress "Mathematical Problems in Engineering, Aerospace and Sciences", La Rochelle, France, 05-08 July 2016.
Available from: 2016-09-26 Created: 2016-09-26 Last updated: 2018-12-18Bibliographically approved
Metri, P. G., Guariglia, E. & Silvestrov, S. (2017). Lie group analysis for MHD boundary layer flow and heat transfer over stretching sheet in presence of viscous dissipation and uniform heat source/sink. In: AIP Conference Proceedings, Volume 1798: . Paper presented at 11th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences, ICNPAA 2016; University of La RochelleLa Rochelle; France; 4 July 2016 through 8 July 2016 (pp. 020096-1-020096-10). American Institute of Physics (AIP), 1798, Article ID 020096.
Open this publication in new window or tab >>Lie group analysis for MHD boundary layer flow and heat transfer over stretching sheet in presence of viscous dissipation and uniform heat source/sink
2017 (English)In: AIP Conference Proceedings, Volume 1798, American Institute of Physics (AIP), 2017, Vol. 1798, p. 020096-1-020096-10, article id 020096Conference paper, Published paper (Refereed)
Abstract [en]

An analysis for the MHD boundary layer flow and heat transfer towards stretching sheet is carried out via symmetry analysis. A steady two-dimensional flow of an electrically conducting incompressible fluid flow over a stretching sheet. The flow permeated by a uniform transverse magnetic field. The governing partial dierential equations are reduced to a system of ordinarydierential equations by the scaling symmetries. The symmetry groups admitted by the corresponding boundary value problem are obtained by using special Lie group transformations. The scaling of group transformations is applied to the governing equations.The system remains invariant due to some relation among the parameters of the transformations. After finding two absolute invariants a third order ordinary dierential equation corresponding to momentum equation and second order dierential equation corresponding to energy equation are derived. The equations along with boundary conditions solved numerically. Numerical solutions of these equations are obtained by using Runge-Kutta-Fehlberg scheme. Further more attention is paid to the eects of some physical parameters magnetic field (Mn), Prandtl number (Pr), Eckert number (Ec) and uniform heat source/sink, on velocity and thermal boundary layer. The results thus obtained are presented graphically and discussed.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017
Keywords
Lie group analysis, uniform heat source/sink, stretching sheet
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33236 (URN)10.1063/1.4972688 (DOI)000399203000096 ()2-s2.0-85013644723 (Scopus ID)9780735414648 (ISBN)
Conference
11th International Conference on Mathematical Problems in Engineering, Aerospace and Sciences, ICNPAA 2016; University of La RochelleLa Rochelle; France; 4 July 2016 through 8 July 2016
Projects
FUSION
Available from: 2016-09-23 Created: 2016-09-23 Last updated: 2018-01-29Bibliographically approved
Cattani, C., Guariglia, E. & Wang, S. (2017). On the Critical Strip of the Riemann zeta Fractional derivative. Fundamenta Informaticae, 151, 459-472
Open this publication in new window or tab >>On the Critical Strip of the Riemann zeta Fractional derivative
2017 (English)In: Fundamenta Informaticae, ISSN 0169-2968, E-ISSN 1875-8681, Vol. 151, p. 459-472Article in journal (Refereed) Published
Abstract [en]

The fractional derivative of the Dirichlet eta function is computed in order to investigate the behavior of the fractional derivative of the Riemann zeta function on the critical strip. Its convergence is studied. In particular, its half-plane of convergence gives the possibility to better understand the fractional derivative of the Riemann zeta function and its critical strip. As an application, two signal processing networks, corresponding to the fractional derivative of the eta function and to its Fourier transform, respectively, are shortly described.

Keywords
Fractional derivative; Riemann zeta function; Dirichlet eta function; signal processing; Fourier transform operator; critical strip.
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33253 (URN)10.3233/FI-2017-1504 (DOI)000398583500029 ()2-s2.0-85015373577 (Scopus ID)
Available from: 2016-09-26 Created: 2016-09-26 Last updated: 2017-05-19Bibliographically approved
Guariglia, E., Silvestrov, S. & Qi, X. (2016). A spectral analysis of the Weierstrass-Mandelbrot function on the Cantor set. In: : . Paper presented at 10th International Conference on Software, Knowledge, Information Management & Applications (SKIMA) 2016, Chengdu, China, 2016..
Open this publication in new window or tab >>A spectral analysis of the Weierstrass-Mandelbrot function on the Cantor set
2016 (English)Conference paper, Oral presentation only (Other academic)
Abstract [en]

In this paper, the Weierstrass-Mandelbrot function on the Cantor set is presented with emphasis on possible applications in science and engineering. An asymptotic estimation of its one-sided Fourier transform, in accordance with the simulation results, is analytically derived. Moreover, a time-frequency analysis of the Weierstrass-Mandelbrot function is provided by the numerical computation of its continuous wavelet transform.

Keywords
Weierstrass-Mandelbrot function, Cantor set, one-sided Fourier transform, continuous wavelet transform.
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33258 (URN)
Conference
10th International Conference on Software, Knowledge, Information Management & Applications (SKIMA) 2016, Chengdu, China, 2016.
Available from: 2016-09-27 Created: 2016-09-27 Last updated: 2016-12-13Bibliographically approved
Guariglia, E. & Silvestrov, S. (2016). Fractional Derivative of Riemann zeta function and Main Properties. In: : . Paper presented at 27th Nordic Congress of Mathematics, Stockholm, 16-20 March 2016.
Open this publication in new window or tab >>Fractional Derivative of Riemann zeta function and Main Properties
2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

The Caputo-Ortigueira fractional derivative provides the fractional derivativeof complex functions. This derivative plays an important role in the number theory, and has been shown suitable for the analysis of the Dirichlet series, Hurwitz zeta function and Riemann zeta function. An integral representation for the fractional derivative of the Riemann zeta function was discovered. Since the Riemann zeta function is widely used in Physics, the unilateral Fourier transform of its fractional derivative is computed to investigate its applications in Quantum Theory and Signal Processing.

Keywords
Caputo-Ortigueira fractional derivative, Riemann zeta function, integral representation
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33259 (URN)
Conference
27th Nordic Congress of Mathematics, Stockholm, 16-20 March 2016
Available from: 2016-09-27 Created: 2016-09-27 Last updated: 2016-12-13Bibliographically approved
Guariglia, E. & Silvestrov, S. (2016). Fractional-Wavelet Analysis of Positive definite Distributions and Wavelets on D’(C). In: Silvestrov, Sergei; Rančić, Milica (Ed.), Engineering Mathematics II: Algebraic, Stochastic and Analysis Structures for Networks, Data Classification and Optimization (pp. 337-353). Springer
Open this publication in new window or tab >>Fractional-Wavelet Analysis of Positive definite Distributions and Wavelets on D’(C)
2016 (English)In: Engineering Mathematics II: Algebraic, Stochastic and Analysis Structures for Networks, Data Classification and Optimization / [ed] Silvestrov, Sergei; Rančić, Milica, Springer, 2016, p. 337-353Chapter in book (Refereed)
Abstract [en]

In the following chapter we describe a wavelet expansion theory for positivedefinite distributions over the real line and define a fractional derivative operator for complex functions in the distribution sense. In order to obtain a characterisation of the complex fractional derivative through the distribution theory, the Ortigueira-Caputo fractional derivative operator is rewritten as a convolution product according to the fractional calculus of real distributions. In particular, the fractional derivative of the Gabor-Morlet wavelet is computed together with its plots and main properties.

Place, publisher, year, edition, pages
Springer, 2016
Series
Springer Proceedings in Mathematics & Statistics, ISSN 2194-1009 ; 179
Keywords
Wavelet basis, positive definite distribution, complex fractional derivative, Gabor-Morlet wavelet.
National Category
Computational Mathematics Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-33256 (URN)10.1007/978-3-319-42105-6_16 (DOI)2-s2.0-85012884806 (Scopus ID)978-3-319-42104-9 (ISBN)978-3-319-42105-6 (ISBN)
Available from: 2016-09-26 Created: 2016-09-26 Last updated: 2019-01-15Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-3320-1493

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