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We study some series expansions for the Lambert $W$ function. We show that known asymptotic series converge in both real and complex domains. We establish the precise domains of convergence and other properties of the series, including…

Classical Analysis and ODEs · Mathematics 2012-08-06 German A. Kalugin , David J. Jeffrey

A new integral representation for the Riemann zeta function is derived. This representation covers the important region of the complex plane where the real part of the argument of the function lies between 0 and 1. Using this…

Number Theory · Mathematics 2017-12-15 Sandeep Tyagi , Christian Holm

Integral Mittag-Leffler, Whittaker and Wright functions with integrands similar to those which already exist in mathematical literature are introduced for the first time. For particular values of parameters, they can be presented in…

Classical Analysis and ODEs · Mathematics 2021-12-23 Alexander Apelblat , Juan Luis González-Santander

We apply the recently defined Lambert W function to some problems of classical statistical mechanics, i.e. the Tonks gas and a fluid of classical particles interacting via repulsive pair potentials. The latter case is considered both from…

Statistical Mechanics · Physics 2009-11-10 Jean-Michel Caillol

We build on a recent paper on Fourier expansions for the Riemann zeta function. We establish Fourier expansions for certain $L$-functions, and offer series representations involving the Whittaker function $W_{\gamma,\mu}(z)$ for the…

Number Theory · Mathematics 2025-10-07 Alexander E. Patkowski

The Lambert W function gives the solutions of a simple exponential polynomial. The generalized Lambert W function was defined by Mez\"{o} and Baricz, and has found applications in delay differential equations and physics. In this article we…

Classical Analysis and ODEs · Mathematics 2018-01-31 Paul Castle

Employing the Lagrange inverting series, a solution of the transcendental equation $(x-a)(x-b)=le^{x}$, that can be considered a quadratic generalization of the equation defining Lambert $W$ function, has been found in terms of Bessel…

Classical Analysis and ODEs · Mathematics 2015-04-28 Giorgio Mugnaini

In the present work, we introduce the Lambert-Tsallis Wq function. It is a generalization of the Lambert W function, that solves the equation Wq(x)expq(Wq(x)) = x, where expq(x) is the q-exponential used by Tsallis in nonextensive…

Statistical Mechanics · Physics 2019-05-01 G. B. da Silva , R. V. Ramos

Problems formulated in terms of logarithmic or exponential equations often use the Lambert $W$ function in their solutions. Expansions, approximations and bounds on $W$ have been derived in an effort to gain a better understanding of the…

Information Theory · Computer Science 2016-01-20 Ioannis Chatzigeorgiou

We describe an algorithm to evaluate all the complex branches of the Lambert W function with rigorous error bounds in interval arithmetic, which has been implemented in the Arb library. The classic 1996 paper on the Lambert W function by…

Mathematical Software · Computer Science 2017-05-10 Fredrik Johansson

In this paper, we present an extension of Mittag-Leffler function by using the extension of beta functions (\"{O}zergin et al. in J. Comput. Appl. Math. 235 (2011), 4601-4610) and obtain some integral representation of this newly defined…

Classical Analysis and ODEs · Mathematics 2017-03-16 G. Rahman , K. S. Nisar , S. Mubeen , M. Arshad

In this paper, we find new integral representations for the generalized Hermite linear functional in the real line and the complex plane. As an application, new integral representations for the Euler Gamma function are given.

Classical Analysis and ODEs · Mathematics 2023-07-25 R. S. Costas-Santos

We consider a sequence of polynomials appearing in expressions for the derivatives of the Lambert W function. The coefficients of each polynomial are shown to form a positive sequence that is log-concave and unimodal. This property implies…

Classical Analysis and ODEs · Mathematics 2010-11-30 G. A. Kalugin , D. J. Jeffrey

In many articles on the integral expressions of Mittag-Leffler functions, we have found that whether the integral expression can be used at the origin is still unresolved. In this article we give the applicable conditions and proof. And we…

Complex Variables · Mathematics 2019-12-16 Yayun Wu , Zhihua Liu

We review the exact solutions of several transcendental equations, obtained by Siewert and his co-workers, in the '70s. Some of them are expressed in terms of the generalized Lambert functions, recently studied by Mez\"o, Baricz and…

General Physics · Physics 2017-03-30 Victor Barsan

The translated logarithmic Lambert function is defined and basic analytic properties of the function are obtained including the derivative, integral, Taylor series expansion, real branches and asymptotic approximation of the function.…

Combinatorics · Mathematics 2021-03-26 Cristina B. Corcino , Roberto B. Corcino

We present a new approach to examine transient dynamics in a class of non-autonomous delay differential equations. Exact solutions for these equations are obtained using the Lambert W function alongside an appropriately chosen initial…

Adaptation and Self-Organizing Systems · Physics 2024-08-20 Kenta Ohira , Toru Ohira

The variable change w=exp(u) is applied to establish novel integral representations of the incomplete gamma-function, hypergeometric F-function,confluent hypergeometric /Phi-function and beta-function, and to analyze these functionsas as…

Functional Analysis · Mathematics 2010-01-15 Sergey K. Sekatskii

In the paper, the authors establish integral representations of some functions related to the remainder of Burnside's formula for the gamma function and find the (logarithmically) complete monotonicity of these and related functions. These…

Classical Analysis and ODEs · Mathematics 2014-04-01 Feng Qi

By using the associated and restricted Stirling numbers of the second kind, we give some generalizations of the poly-Bernoulli numbers. We also study their arithmetical and combinatorial properties. As an application, at the end of the…

Number Theory · Mathematics 2015-10-26 Takao Komatsu , Kalman Liptai , István Mező