Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Silvia Li"'
Publikováno v:
Symmetry, Vol 15, Iss 12, p 2157 (2023)
The theory of Gaussian functions is reformulated using an umbral point of view. The symbolic method we adopt here allows an interpretation of the Gaussian in terms of a Lorentzian image function. The formalism also suggests the introduction of a new
Externí odkaz:
https://doaj.org/article/5fdc8c67ba964974a2361c21f490979d
Autor:
Giuseppe Dattoli, Silvia Licciardi
Publikováno v:
Symmetry, Vol 15, Iss 6, p 1254 (2023)
The monomiality principle is based on an abstract definition of the concept of derivative and multiplicative operators. This allows to treat different families of special polynomials as ordinary monomials. The procedure underlines a generalization of
Externí odkaz:
https://doaj.org/article/d1df91f64c2d4b4b94cfa7019c3fa72a
Publikováno v:
Mathematics, Vol 9, Iss 21, p 2664 (2021)
The use of non-standard calculus means have been proven to be extremely powerful for studying old and new properties of special functions and polynomials. These methods have helped to frame either elementary and special functions within the same logi
Externí odkaz:
https://doaj.org/article/74184f40fd6e4102a877f52f9fe7d501
Publikováno v:
Symmetry, Vol 13, Iss 5, p 781 (2021)
The formalism of differ-integral calculus, initially developed to treat differential operators of fractional order, realizes a complete symmetry between differential and integral operators. This possibility has opened new and interesting scenarios, o
Externí odkaz:
https://doaj.org/article/45be0b6b73004781a7b035af4e339b7f
Decision support based on single valued neutrosophic number for information system project selection
Autor:
Silvia Liliana Tejada Yepez
Publikováno v:
Neutrosophic Sets and Systems, Vol 17, Pp 39-41 (2017)
Neutrosophic sets and its application to decision support have become a topic of great importance for researchers and practitioners alike. In this paper, a new model for decision making in the selection of information system projects is presented bas
Externí odkaz:
https://doaj.org/article/ccc0c813e1d348bcb881c1e7565b65df
Publikováno v:
Symmetry, Vol 13, Iss 2, p 159 (2021)
The theory of Generalized Bessel Functions is reviewed and their application to various problems in the study of electro-magnetic processes is presented. We consider the cases of emission of bremsstrahlung radiation by ultra-relativistic electrons in
Externí odkaz:
https://doaj.org/article/63218d11840348be8052d6bab738d7c7
Publikováno v:
Mathematical and Computational Applications, Vol 25, Iss 3, p 49 (2020)
In this paper, we show that the use of methods of an operational nature, such as umbral calculus, allows achieving a double target: on one side, the study of the Voigt function, which plays a pivotal role in spectroscopic studies and in other applica
Externí odkaz:
https://doaj.org/article/fb49d7417dd64c1c8a41051bda6c8168
Publikováno v:
Axioms, Vol 8, Iss 3, p 77 (2019)
Dual numbers and their higher-order version are important tools for numerical computations, and in particular for finite difference calculus. Based on the relevant algebraic rules and matrix realizations of dual numbers, we present a novel point of v
Externí odkaz:
https://doaj.org/article/a1e6cabaf9cc456f95ccc4d55244cd0f
Publikováno v:
Mathematics, Vol 7, Iss 7, p 577 (2019)
In this paper, we introduce higher-order harmonic numbers and derive their relevant properties and generating functions by using an umbral-type method. We discuss the link with recent works on the subject, and show that the combinations of umbral and
Externí odkaz:
https://doaj.org/article/b34e7aa6d66e47488a17547de8a97c6b
Publikováno v:
Mathematics, Vol 7, Iss 2, p 124 (2019)
Inspired by ideas from umbral calculus and based on the two types of integrals occurring in the defining equations for the gamma and the reciprocal gamma functions, respectively, we develop a multi-variate version of umbral calculus and of the so-cal
Externí odkaz:
https://doaj.org/article/2a1f22813a674968b8968c728f5a1dd5