Contents What These Numbers Count Triangle Scheme for Calculations
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
On Moment Sequences and Mixed Poisson Distributions
ON MOMENT SEQUENCES AND MIXED POISSON DISTRIBUTIONS MARKUS KUBA AND ALOIS PANHOLZER Abstract. In this article we survey properties of mixed Poisson dis- tributions and probabilistic aspects of the Stirling transform: given a non-negative random variable X with moment sequence (µs)s∈N we de- termine a discrete random variable Y , whose moment sequence is given by the Stirling transform of the sequence (µs)s∈N, and identify the dis- tribution as a mixed Poisson distribution. We discuss properties of this family of distributions and present a simple limit theorem based on ex- pansions of factorial moments instead of power moments. Moreover, we present several examples of mixed Poisson distributions in the analysis of random discrete structures, unifying and extending earlier results. We also add several entirely new results: we analyse triangular urn mod- els, where the initial configuration or the dimension of the urn is not fixed, but may depend on the discrete time n. We discuss the branch- ing structure of plane recursive trees and its relation to table sizes in the Chinese restaurant process. Furthermore, we discuss root isolation procedures in Cayley-trees, a parameter in parking functions, zero con- tacts in lattice paths consisting of bridges, and a parameter related to cyclic points and trees in graphs of random mappings, all leading to mixed Poisson-Rayleigh distributions. Finally, we indicate how mixed Poisson distributions naturally arise in the critical composition scheme of Analytic Combinatorics. 1. Introduction In combinatorics the Stirling transform of a given sequence (as)s∈N, see [12, 75], is the sequence (bs)s∈N, with elements given by ( ) s s b = X a , s ≥ 1. -
Arxiv:1311.5067V5 [Math.CO] 27 Jan 2021 and Φ Eso H Rtadscn Id Ohplnma Aiisapa As Appear Su Families Order
Multivariate Stirling Polynomials of the First and Second Kind Alfred Schreiber Department of Mathematics and Mathematical Education, University of Flensburg, Auf dem Campus 1, D-24943 Flensburg, Germany Abstract Two doubly indexed families of homogeneous and isobaric polynomials in several indeterminates are considered: the (partial) exponential Bell polyno- −(2n−1) mials Bn,k and a new family Sn,k ∈ Z[X1, . ,Xn−k+1] such that X1 Sn,k and Bn,k obey an inversion law which generalizes that of the Stirling num- bers of the first and second kind. Both polynomial families appear as Lie coefficients in expansions of certain derivatives of higher order. Substituting Dj(ϕ) (the j-th derivative of a fixed function ϕ) in place of the indeterminates Xj shows that both Sn,k and Bn,k are differential polynomials depending on ϕ and on its inverse ϕ, respectively. Some new light is shed thereby on Comtet’s solution of the Lagrange inversion problem in terms of the Bell polynomials. According to Haiman and Schmitt that solution is essentially the antipode on the Fa`adi Bruno Hopf algebra. It can be represented by −(2n−1) X1 Sn,1. Moreover, a general expansion formula that holds for the whole family Sn,k (1 ≤ k ≤ n) is established together with a closed expression for the coefficients of Sn,k. Several important properties of the Stirling numbers are demonstrated to be special cases of relations between the corresponding arXiv:1311.5067v5 [math.CO] 27 Jan 2021 polynomials. As a non-trivial example, a Schl¨omilch-type formula is derived expressing Sn,k in terms of the Bell polynomials Bn,k, and vice versa. -
An Identity for Generalized Bernoulli Polynomials
1 2 Journal of Integer Sequences, Vol. 23 (2020), 3 Article 20.11.2 47 6 23 11 An Identity for Generalized Bernoulli Polynomials Redha Chellal1 and Farid Bencherif LA3C, Faculty of Mathematics USTHB Algiers Algeria [email protected] [email protected] [email protected] Mohamed Mehbali Centre for Research Informed Teaching London South Bank University London United Kingdom [email protected] Abstract Recognizing the great importance of Bernoulli numbers and Bernoulli polynomials in various branches of mathematics, the present paper develops two results dealing with these objects. The first one proposes an identity for the generalized Bernoulli poly- nomials, which leads to further generalizations for several relations involving classical Bernoulli numbers and Bernoulli polynomials. In particular, it generalizes a recent identity suggested by Gessel. The second result allows the deduction of similar identi- ties for Fibonacci, Lucas, and Chebyshev polynomials, as well as for generalized Euler polynomials, Genocchi polynomials, and generalized numbers of Stirling. 1Corresponding author. 1 1 Introduction Let N and C denote, respectively, the set of positive integers and the set of complex numbers. (α) In his book, Roman [41, p. 93] defined generalized Bernoulli polynomials Bn (x) as follows: for all n ∈ N and α ∈ C, we have ∞ tn t α B(α)(x) = etx. (1) n n! et − 1 Xn=0 The Bernoulli numbers Bn, classical Bernoulli polynomials Bn(x), and generalized Bernoulli (α) numbers Bn are, respectively, defined by (1) (α) (α) Bn = Bn(0), Bn(x)= Bn (x), and Bn = Bn (0). (2) The Bernoulli numbers and the Bernoulli polynomials play a fundamental role in various branches of mathematics, such as combinatorics, number theory, mathematical analysis, and topology. -
Interview of Albert Tucker
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange About Harlan D. Mills Science Alliance 9-1975 Interview of Albert Tucker Terry Speed Evar Nering Follow this and additional works at: https://trace.tennessee.edu/utk_harlanabout Part of the Mathematics Commons Recommended Citation Speed, Terry and Nering, Evar, "Interview of Albert Tucker" (1975). About Harlan D. Mills. https://trace.tennessee.edu/utk_harlanabout/13 This Report is brought to you for free and open access by the Science Alliance at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in About Harlan D. Mills by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. The Princeton Mathematics Community in the 1930s (PMC39)The Princeton Mathematics Community in the 1930s Transcript Number 39 (PMC39) © The Trustees of Princeton University, 1985 ALBERT TUCKER CAREER, PART 2 This is a continuation of the account of the career of Albert Tucker that was begun in the interview conducted by Terry Speed in September 1975. This recording was made in March 1977 by Evar Nering at his apartment in Scottsdale, Arizona. Tucker: I have recently received the tapes that Speed made and find that these tapes carried my history up to approximately 1938. So the plan is to continue the history. In the late '30s I was working in combinatorial topology with not a great deal of results to show. I guess I was really more interested in my teaching. I had an opportunity to teach an undergraduate course in topology, combinatorial topology that is, classification of 2-dimensional surfaces and that sort of thing. -
E. T. Bell and Mathematics at Caltech Between the Wars Judith R
E. T. Bell and Mathematics at Caltech between the Wars Judith R. Goodstein and Donald Babbitt E. T. (Eric Temple) Bell, num- who was in the act of transforming what had been ber theorist, science fiction a modest technical school into one of the coun- novelist (as John Taine), and try’s foremost scientific institutes. It had started a man of strong opinions out in 1891 as Throop University (later, Throop about many things, joined Polytechnic Institute), named for its founder, phi- the faculty of the California lanthropist Amos G. Throop. At the end of World Institute of Technology in War I, Throop underwent a radical transformation, the fall of 1926 as a pro- and by 1921 it had a new name, a handsome en- fessor of mathematics. At dowment, and, under Millikan, a new educational forty-three, “he [had] be- philosophy [Goo 91]. come a very hot commodity Catalog descriptions of Caltech’s program of in mathematics” [Rei 01], advanced study and research in pure mathematics having spent fourteen years in the 1920s were intended to interest “students on the faculty of the Univer- specializing in mathematics…to devote some sity of Washington, along of their attention to the modern applications of with prestigious teaching mathematics” and promised “to provide defi- stints at Harvard and the nitely for such a liaison between pure and applied All photos courtesy of the Archives, California Institute of Technology. of Institute California Archives, the of courtesy photos All University of Chicago. Two Eric Temple Bell (1883–1960), ca. mathematics by the addition of instructors whose years before his arrival in 1951. -
Expansions of Generalized Euler's Constants Into the Series Of
Journal of Number Theory 158 (2016) 365–396 Contents lists available at ScienceDirect Journal of Number Theory www.elsevier.com/locate/jnt Expansions of generalized Euler’s constants into −2 the series of polynomials in π and into the formal enveloping series with rational coefficients only Iaroslav V. Blagouchine 1 University of Toulon, France a r t i c l e i n f o a b s t r a c t Article history: In this work, two new series expansions for generalized Received 1 January 2015 Euler’s constants (Stieltjes constants) γm are obtained. The Received in revised form 26 June first expansion involves Stirling numbers of the first kind, 2015 − contains polynomials in π 2 with rational coefficients and Accepted 29 June 2015 converges slightly better than Euler’s series n−2. The Available online 18 August 2015 Communicated by David Goss second expansion is a semi-convergent series with rational coefficients only. This expansion is particularly simple and Keywords: involves Bernoulli numbers with a non-linear combination of Generalized Euler’s constants generalized harmonic numbers. It also permits to derive an Stieltjes constants interesting estimation for generalized Euler’s constants, which Stirling numbers is more accurate than several well-known estimations. Finally, Factorial coefficients in Appendix A, the reader will also find two simple integral Series expansion definitions for the Stirling numbers of the first kind, as well Divergent series Semi-convergent series an upper bound for them. Formal series © 2015 Elsevier Inc. All rights reserved. Enveloping series Asymptotic expansions Approximations Bernoulli numbers Harmonic numbers Rational coefficients Inverse pi E-mail address: [email protected]. -
Multivariate Expansions Associated with Sheffer-Type Polynomials and Operators
Bulletin of the Institute of Mathematics Academia Sinica (New Series) Vol. 1 (2006), No. 4, pp. 451-473 MULTIVARIATE EXPANSIONS ASSOCIATED WITH SHEFFER-TYPE POLYNOMIALS AND OPERATORS BY TIAN XIAO HE, LEETSCH C. HSU, AND PETER J.-S. SHIUE Abstract With the aid of multivariate Sheffer-type polynomials and differential operators, this paper provides two kinds of general ex- pansion formulas, called respectively the first expansion formula and the second expansion formula, that yield a constructive solu- [ tion to the problem of the expansion of A(tˆ)f(g(t)) (a composi- tion of any given formal power series) and the expansion of the multivariate entire functions in terms of multivariate Sheffer-type polynomials, which may be considered an application of the first expansion formula and the Sheffer-type operators. The results are applicable to combinatorics and special function theory. 1. Introduction The purpose of this paper is to study the following expansion problem. Problem 1. Let tˆ = (t1,t2,...,tr), A(tˆ), g(t) = (g1(t1), g2(t2),..., gr(tr)) and f(tˆ) be any given formal power series over the complex number Cr ˆ ′ d field with A(0) = 1, gi(0) = 0 and gi(0) 6= 0 (i = 1, 2, . , r). We wish to find the power series expansion in tˆ of the composite function A(tˆ)f(g(t)). Received October 18, 2005 and in revised form July 5, 2006. d Communicated by Xuding Zhu. AMS Subject Classification: 05A15, 11B73, 11B83, 13F25, 41A58. Key words and phrases: Multivariate formal power series, multivariate Sheffer-type polynomials, multivariate Sheffer-type differential operators, multivariate weighted Stirling numbers, multivariate Riordan array pair, multivariate exponential polynomials. -
FOCUS 8 3.Pdf
Volume 8, Number 3 THE NEWSLETTER OF THE MATHEMATICAL ASSOCIATION OF AMERICA May-June 1988 More Voters and More Votes for MAA Mathematics and the Public Officers Under Approval Voting Leonard Gilman Over 4000 MAA mebers participated in the 1987 Association-wide election, up from about 3000 voters in the elections two years ago. Is it possible to enhance the public's appreciation of mathematics and Lida K. Barrett, was elected President Elect and Alan C. Tucker was mathematicians? Science writers are helping us by turning out some voted in as First Vice-President; Warren Page was elected Second first-rate news stories; but what about mathematics that is not in the Vice-President. Lida Barrett will become President, succeeding Leon news? Can we get across an idea here, a fact there, and a tiny notion ard Gillman, at the end of the MAA annual meeting in January of 1989. of what mathematics is about and what it is for? Is it reasonable even See the article below for an analysis of the working of approval voting to try? Yes. Herewith are some thoughts on how to proceed. in this election. LOUSY SALESPEOPLE Let us all become ambassadors of helpful information and good will. The effort will be unglamorous (but MAA Elections Produce inexpensive) and results will come slowly. So far, we are lousy salespeople. Most of us teach and think we are pretty good at it. But Decisive Winners when confronted by nonmathematicians, we abandon our profession and become aloof. We brush off questions, rejecting the opportunity Steven J. -
Degenerate Stirling Polynomials of the Second Kind and Some Applications
S S symmetry Article Degenerate Stirling Polynomials of the Second Kind and Some Applications Taekyun Kim 1,*, Dae San Kim 2,*, Han Young Kim 1 and Jongkyum Kwon 3,* 1 Department of Mathematics, Kwangwoon University, Seoul 139-701, Korea 2 Department of Mathematics, Sogang University, Seoul 121-742, Korea 3 Department of Mathematics Education and ERI, Gyeongsang National University, Jinju 52828, Korea * Correspondence: [email protected] (T.K.); [email protected] (D.S.K.); [email protected] (J.K.) Received: 20 July 2019; Accepted: 13 August 2019; Published: 14 August 2019 Abstract: Recently, the degenerate l-Stirling polynomials of the second kind were introduced and investigated for their properties and relations. In this paper, we continue to study the degenerate l-Stirling polynomials as well as the r-truncated degenerate l-Stirling polynomials of the second kind which are derived from generating functions and Newton’s formula. We derive recurrence relations and various expressions for them. Regarding applications, we show that both the degenerate l-Stirling polynomials of the second and the r-truncated degenerate l-Stirling polynomials of the second kind appear in the expressions of the probability distributions of appropriate random variables. Keywords: degenerate l-Stirling polynomials of the second kind; r-truncated degenerate l-Stirling polynomials of the second kind; probability distribution 1. Introduction For n ≥ 0, the Stirling numbers of the second kind are defined as (see [1–26]) n n x = ∑ S2(n, k)(x)k, (1) k=0 where (x)0 = 1, (x)n = x(x − 1) ··· (x − n + 1), (n ≥ 1). -
A Determinant Expression for the Generalized Bessel Polynomials
Hindawi Publishing Corporation Journal of Applied Mathematics Volume 2013, Article ID 242815, 6 pages http://dx.doi.org/10.1155/2013/242815 Research Article A Determinant Expression for the Generalized Bessel Polynomials Sheng-liang Yang and Sai-nan Zheng Department of Applied Mathematics, Lanzhou University of Technology, Lanzhou, Gansu 730050, China Correspondence should be addressed to Sheng-liang Yang; [email protected] Received 5 June 2013; Accepted 25 July 2013 Academic Editor: Carla Roque Copyright © 2013 S.-l. Yang and S.-n. Zheng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Using the exponential Riordan arrays, we show that a variation of the generalized Bessel polynomial sequence is of Sheffer type, and we obtain a determinant formula for the generalized Bessel polynomials. As a result, the Bessel polynomial is represented as determinant the entries of which involve Catalan numbers. − 1. Introduction Let (, ) denote the coefficient of in −1().We call (, ) a signless Bessel number of the first kind and − The Bessel polynomials form a set of orthogonal polyno- (, ) = (−1) (, ) aBesselnumberofthefirst mials on the unit circle in the complex plane. They are kind. The Bessel number of the second kind (, ) is important in certain problems of mathematical physics; defined to be the number of set partitions of [] := for example, they arise in the study of electrical net- {1,2,3,...,} into blocks of size one or two. Han and works and when the wave equation is considered in spher- Seo [3] showed that the two kinds of Bessel numbers are ical coordinates. -
A Note on Some Identities of New Type Degenerate Bell Polynomials
mathematics Article A Note on Some Identities of New Type Degenerate Bell Polynomials Taekyun Kim 1,2,*, Dae San Kim 3,*, Hyunseok Lee 2 and Jongkyum Kwon 4,* 1 School of Science, Xi’an Technological University, Xi’an 710021, China 2 Department of Mathematics, Kwangwoon University, Seoul 01897, Korea; [email protected] 3 Department of Mathematics, Sogang University, Seoul 04107, Korea 4 Department of Mathematics Education and ERI, Gyeongsang National University, Gyeongsangnamdo 52828, Korea * Correspondence: [email protected] (T.K.); [email protected] (D.S.K.); [email protected] (J.K.) Received: 24 October 2019; Accepted: 7 November 2019; Published: 11 November 2019 Abstract: Recently, the partially degenerate Bell polynomials and numbers, which are a degenerate version of Bell polynomials and numbers, were introduced. In this paper, we consider the new type degenerate Bell polynomials and numbers, and obtain several expressions and identities on those polynomials and numbers. In more detail, we obtain an expression involving the Stirling numbers of the second kind and the generalized falling factorial sequences, Dobinski type formulas, an expression connected with the Stirling numbers of the first and second kinds, and an expression involving the Stirling polynomials of the second kind. Keywords: Bell polynomials; partially degenerate Bell polynomials; new type degenerate Bell polynomials MSC: 05A19; 11B73; 11B83 1. Introduction Studies on degenerate versions of some special polynomials can be traced back at least as early as the paper by Carlitz [1] on degenerate Bernoulli and degenerate Euler polynomials and numbers. In recent years, many mathematicians have drawn their attention in investigating various degenerate versions of quite a few special polynomials and numbers and discovered some interesting results on them [2–9]. -
Recurrence Relation Lower and Upper Bounds Maximum Parity Simple
From Wikipedia, the free encyclopedia In mathematics, particularly in combinatorics, a Stirling number of the second kind (or Stirling partition number) is the number of ways to partition a set of n objects into k non-empty subsets and is denoted by or .[1] Stirling numbers of the second kind occur in the field of mathematics called combinatorics and the study of partitions. Stirling numbers of the second kind are one of two kinds of Stirling numbers, the other kind being called Stirling numbers of the first kind (or Stirling cycle numbers). Mutually inverse (finite or infinite) triangular matrices can be formed from the Stirling numbers of each kind according to the parameters n, k. 1 Definition The 15 partitions of a 4-element set 2 Notation ordered in a Hasse diagram 3 Bell numbers 4 Table of values There are S(4,1),...,S(4,4) = 1,7,6,1 partitions 5 Properties containing 1,2,3,4 sets. 5.1 Recurrence relation 5.2 Lower and upper bounds 5.3 Maximum 5.4 Parity 5.5 Simple identities 5.6 Explicit formula 5.7 Generating functions 5.8 Asymptotic approximation 6 Applications 6.1 Moments of the Poisson distribution 6.2 Moments of fixed points of random permutations 6.3 Rhyming schemes 7 Variants 7.1 Associated Stirling numbers of the second kind 7.2 Reduced Stirling numbers of the second kind 8 See also 9 References The Stirling numbers of the second kind, written or or with other notations, count the number of ways to partition a set of labelled objects into nonempty unlabelled subsets.