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Meromorphic function
In mathematics, the polygamma function of order m is a meromorphic function on the complex numbers C {\displaystyle \mathbb {C} } defined as the (m +
Polygamma_function
Mathematical function
(z)={\frac {\Gamma '(z)}{\Gamma (z)}}.} It is the first of the polygamma functions. This function is strictly increasing and strictly concave on ( 0 , ∞ ) {\displaystyle
Digamma_function
Extension of the factorial function
gamma function Multivariate gamma function p-adic gamma function Pochhammer k-symbol Polygamma function q-gamma function Ramanujan's master theorem Spouge's
Gamma_function
In mathematics, the generalized polygamma function or balanced negapolygamma function is a function introduced by Olivier Espinosa Aldunate and Victor
Balanced_polygamma_function
Analytic function in mathematics
where ψ {\displaystyle \psi } and γ {\displaystyle \gamma } are the polygamma function and Euler's constant, respectively, as well as ∑ n = 1 ∞ ζ ( 2 n )
Riemann_zeta_function
Identity obeyed by many special functions related to the gamma function
The polygamma identities can be used to obtain a multiplication theorem for harmonic numbers. The Hurwitz zeta function generalizes the polygamma function
Multiplication_theorem
Transcendental single-variable function
tangent integral, polygamma function, Riemann zeta function, Dirichlet eta function, and Dirichlet beta function. The Clausen function of order 2 – often
Clausen_function
Mathematical function
In mathematics, the trigamma function, denoted ψ1(z) or ψ(1)(z), is the second of the polygamma functions, and is defined by ψ 1 ( z ) = d 2 d z 2 ln
Trigamma_function
Special mathematical function
Also the series representation of Dirichlet beta function can be formed in terms of the polygamma function β ( s ) = 1 2 s ∑ n = 0 ∞ ( − 1 ) n ( n + 1 2
Dirichlet_beta_function
Concept in mathematics
s}}\right|_{s=a},\ \ \zeta (s,q)=\sum _{k=0}^{\infty }(k+q)^{-s}} Definition via polygamma function: K ( z ) = exp [ ψ ( − 2 ) ( z ) + z 2 − z 2 − z 2 ln 2 π ] {\displaystyle
K-function
analogue. Digamma function, Polygamma function Incomplete beta function Incomplete gamma function K-function Multivariate gamma function: A generalization
List of mathematical functions
List_of_mathematical_functions
Penultimate letter in the Greek alphabet
S2CID 193082268. Weisstein, Eric W. "Polygamma Function". mathworld.wolfram.com. Retrieved 2025-02-08. A special function mostly commonly denoted ψ_n(z), ψ^((n))(z)
Psi_(Greek)
Numerical computation of special functions
gamma function Γ ( z ) {\textstyle \Gamma (z)} , due to Leonhard Euler. There is also a reflection formula for the general n-th order polygamma function ψ(n)(z)
Reflection_formula
Special mathematical function
{z}{2^{s}}}\Phi (-z^{2},s,{\tfrac {1}{2}})} The polygamma functions for positive integers n: ψ ( n ) ( α ) = ( − 1 ) n + 1 n ! Φ ( 1
Lerch_transcendent
Topics referred to by the same term
Chebyshev function ψ ( x ) {\displaystyle \psi (x)} the polygamma function ψ m ( z ) {\displaystyle \psi ^{m}(z)} or its special cases the digamma function ψ
Psi_function
Number of subsets of a given size
previous generating function after the substitution x → x y {\displaystyle x\to xy} . A symmetric exponential bivariate generating function of the binomial
Binomial_coefficient
Special function in mathematics
uniform electric field. The Hurwitz zeta function with a positive integer m is related to the polygamma function: ψ ( m ) ( z ) = ( − 1 ) m + 1 m ! ζ (
Hurwitz_zeta_function
Riemann zeta function. Γ ( z ) {\displaystyle \Gamma (z)} is the gamma function. ψ n ( z ) {\displaystyle \psi _{n}(z)} is a polygamma function. Li s (
List_of_mathematical_series
{t}{1-t}}\right]} which holds for |t| < 2. Here, ψ is the digamma function and ψ(m) is the polygamma function. Many series involving the binomial coefficient may be
Rational_zeta_series
Probability distribution
the trigamma function, denoted ψ1(α), is the second of the polygamma functions, and is defined as the derivative of the digamma function: ψ 1 ( α ) =
Beta_distribution
Symbols for constants, special functions
the stream function in fluid dynamics the reciprocal Fibonacci constant the second Chebyshev function in number theory the polygamma function in mathematics
Greek letters used in mathematics, science, and engineering
Greek_letters_used_in_mathematics,_science,_and_engineering
Probability distribution
1)\psi ^{0}(k/2))} where ψ 0 ( z ) {\displaystyle \psi ^{0}(z)} is the polygamma function. We find the large n=k+1 approximation of the mean and variance of
Chi_distribution
Mathematical function
the polygamma function of order 2 k {\displaystyle 2k} . The Riemann–Siegel theta function is of interest in studying the Riemann zeta function, since
Riemann–Siegel_theta_function
Inverse of the gamma function
{1}{z^{4}}}\right)\,,} where ψ ( n ) ( x ) {\displaystyle \psi ^{(n)}(x)} is the polygamma function. Borwein, Jonathan M.; Corless, Robert M. (2017). "Gamma and Factorial
Inverse_gamma_function
Operation on formal power series
other series for the zeta-function-related cases of the Legendre chi function, the polygamma function, and the Riemann zeta function include χ 1 ( z ) = ∑
Generating function transformation
Generating_function_transformation
Probability distribution
(\alpha )} is strictly concave, by using inequality properties of the polygamma function. Finding the maximum with respect to α by taking the derivative and
Gamma_distribution
Mathematical operation in calculus
needed] The digamma function, and by extension the polygamma function, is defined in terms of the logarithmic derivative of the gamma function. Generalizations
Logarithmic_derivative
negative integer exponents, the indefinite sum is closely related to the polygamma function: ∑ x 1 x a = ( − 1 ) a − 1 ψ ( a − 1 ) ( x ) ( a − 1 ) ! + C , a ∈
List_of_indefinite_sums
Sum of the first n whole number reciprocals; 1/1 + 1/2 + 1/3 + ... + 1/n
integer, and m > 1 {\displaystyle m>1} integer or not, we have from polygamma functions: H q / p , m = ζ ( m ) − p m ∑ k = 1 ∞ 1 ( q + p k ) m {\displaystyle
Harmonic_number
Topics referred to by the same term
Melchior Islands, Antarctica Chebyshev function Dedekind psi function Digamma function Polygamma functions Stream function, in two-dimensional flows Polar tangential
Psi
Branch of discrete mathematics
combinatorics, which uses explicit combinatorial formulae and generating functions to describe the results, analytic combinatorics aims at obtaining asymptotic
Combinatorics
Number, approximately 0.916
[citation needed] G appears in values of the second polygamma function, also called the trigamma function, at fractional arguments: ψ 1 ( 1 4 ) = π 2 + 8
Catalan's_constant
Probability distribution on a hyper-sphere of arbitrary dimension
where ψ ′ = ψ ( 1 ) {\displaystyle \psi '=\psi ^{(1)}} is the first polygamma function. The variances decrease, the distributions of all three variables
Von_Mises–Fisher_distribution
Family of probability distributions often used to model tails or extreme values
parameter ξ {\displaystyle \xi } only through the polygamma function of order 1 (also called the trigamma function): Var [ Y ] = { ψ ′ ( 1 ) − ψ ′ ( − 1 / ξ
Generalized Pareto distribution
Generalized_Pareto_distribution
Multivariate generalization of the gamma function
_{p}(a)}{\partial a}}=\sum _{i=1}^{p}\psi (a+(1-i)/2),} and the general polygamma function as ψ p ( n ) ( a ) = ∂ n log Γ p ( a ) ∂ a n = ∑ i = 1 p ψ ( n )
Multivariate_gamma_function
Summation formula
Here the left-hand side is equal to ψ(1)(z), namely the first-order polygamma function defined by ψ ( 1 ) ( z ) = d 2 d z 2 ln Γ ( z ) ; {\displaystyle
Euler–Maclaurin_formula
(also falling, lower, rising, upper factorials) Poisson distribution Polygamma function Primorial Proof of Bertrand's postulate Sierpinski triangle Star of
List of factorial and binomial topics
List_of_factorial_and_binomial_topics
Numbers expressible as integrals of algebraic functions
a complex number that can be expressed as an integral of an algebraic function over an algebraic domain. The periods are a class of numbers which includes
Period_(number_theory)
Mathematical constant
ISSN 0962-8444. JSTOR 52768. Adamchik, Victor S. (1998-12-21). "Polygamma functions of negative order". Journal of Computational and Applied Mathematics
Glaisher–Kinkelin_constant
Sum of the inverses of the positive cubes
representations via the known integral formulas for the gamma and polygamma functions. Apéry's constant is related to the following continued fraction:
Apéry's_constant
Name for several different families of probability distributions
function, while ψ ′ = ψ ( 1 ) {\displaystyle \psi '=\psi ^{(1)}} is its first derivative, also known as the trigamma function, or the first polygamma
Generalized logistic distribution
Generalized_logistic_distribution
(2001), 13-20. A. Laforgia, P. Natalini, Exponential, gamma and polygamma functions: Simple proofs of classical and new inequalities, J. Math. Anal.
Gautschi's_inequality
Rational numbers in a reciprocal logarithm
known that the zeta function, the gamma function, the polygamma functions, the Stieltjes constants and many other special functions and constants may be
Gregory_coefficients
Swedish mathematician and politician (1814–1886)
curious that some of Malmsten's integrals lead to the gamma- and polygamma functions of a complex argument, which are not often encountered in analysis
Carl_Johan_Malmsten
Problem in probability theory
the binomial coefficient via the gamma function and expanding as the exp {\displaystyle \exp } of the polygamma series (in terms of generalised harmonic
Coupon_collector's_problem
American mathematician
1090/s0002-9947-1924-1501261-5. MR 1501261. Davis, H. T. (1935). "An extension to polygamma functions of a theorem of Gauss". Bull. Amer. Math. Soc. 41 (4): 243–247. doi:10
Harold_Thayer_Davis
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
Biblical
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Male
Egyptian
, the son of the functionary Heknofre.
Surname or Lastname
English
English : nickname from the animal, Middle English catte ‘cat’. The word is found in similar forms in most European languages from very early times (e.g. Gaelic cath, Slavic kotu). Domestic cats were unknown in Europe in classical times, when weasels fulfilled many of their functions, for example in hunting rodents. They seem to have come from Egypt, where they were regarded as sacred animals.English : from a medieval female personal name, a short form of Catherine.Variant spelling of German and Dutch Katt.
Surname or Lastname
English (chiefly Kent and Sussex)
English (chiefly Kent and Sussex) : occupational name for a designer or engineer, from a Middle English reduced form of Old French engineor ‘contriver’ (a derivative of engaigne ‘cunning’, ‘ingenuity’, ‘stratagem’, ‘device’). Engineers in the Middle Ages were primarily designers and builders of military machines, although in peacetime they might turn their hands to architecture and other more pacific functions.German : from the Latin personal name Januarius (see January 1). Jänner is a South German word for ‘January’, and so it is possible that this is one of the surnames acquired from words denoting months of the year, for example by converts who had been baptized in that month, people who were born or baptized in that month, or people whose taxes were due in January.
Male
Egyptian
, an Egyptian functionary.
Male
Egyptian
, Functionary of the Interior.
Male
Celtic
, great justiciary, or functionary.
Male
Egyptian
, an Egyptian functionary.
Surname or Lastname
English
English : topographic name for someone who lived by the gates of a medieval walled town. The Middle English singular gate is from the Old English plural, gatu, of geat ‘gate’ (see Yates). Since medieval gates were normally arranged in pairs, fastened in the center, the Old English plural came to function as a singular, and a new Middle English plural ending in -s was formed. In some cases the name may refer specifically to the Sussex place Eastergate (i.e. ‘eastern gate’), known also as Gates in the 13th and 14th centuries, when surnames were being acquired.Americanized spelling of German Götz (see Goetz).Translated form of French Barrière (see Barriere).In New England, Gates was the preferred English version of the name of an extensive French family, called Barrière dit Langevin.
Male
Egyptian
, a high Egyptian functionary.
Boy/Male
Buddhist, Indian, Japanese
Mysterious Function
Male
Egyptian
, a great functionary.
Surname or Lastname
English
English : occupational name for a dresser of cloth, Old English fullere (from Latin fullo, with the addition of the English agent suffix). The Middle English successor of this word had also been reinforced by Old French fouleor, foleur, of similar origin. The work of the fuller was to scour and thicken the raw cloth by beating and trampling it in water. This surname is found mostly in southeast England and East Anglia. See also Tucker and Walker.In a few cases the name may be of German origin with the same form and meaning as 1 (from Latin fullare).Americanized version of French Fournier.Samuel Fuller (1589–1633), born in Redenhall, Norfolk, England, was among the Pilgrim Fathers who sailed on the Mayflower in 1620. He was a deacon of the church and until his death functioned as Plymouth Colony’s physician.
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
Boy/Male
Muslim
Bin al-jahm was a narrator of Hadith
Boy/Male
Tamil
Strong
Girl/Female
Spanish American Teutonic German English
noble.
Boy/Male
Hindu, Indian, Marathi
Blessings
Girl/Female
Tamil
Suprati | ஸà¯à®ªà¯à®°à®¤à®¿Â
Nice copy
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
God of the Vedas
Boy/Male
British, English, Jamaican
A Steep Bank; From the Cliff
Girl/Female
Hindu
Mild, Goddess Durga
Boy/Male
Irish
Means “â€brave with a spearâ€â€ or “â€spear carrier.â€â€ The name is associated with Gearoid Fitzgerald, the 3rd Earl of Desmond (1338-98) and leader of the most powerful Norman family in late medieval Ireland. It was believed he had magical powers and is reputed to protect the environment at Lough Gur, where he had a castle in County Limerick. In one story, when a local landowner planned to drain the lake or forbid local people access to it Gearoid made his horse bolt, fatally injuring the landowner. Some even say that he is sleeping at the bottom of Lough Gur, waiting to return to the land of the living.
Boy/Male
Indian, Sanskrit
Praying to Heaven
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
POLYGAMMA FUNCTION
a.
One who practices polygamy, or maintains its lawfulness.
n. pl.
The third order of the Linnaean class Polygamia.
a.
Of, pertaining to, or obtained from, Polygala; specifically, designating an acrid glucoside (called polygalic acid, senegin, etc.), resembling, or possibly identical with, saponin.
n. pl.
A Linnaean class of plants, characterized by having both hermaphrodite and unisexual flowers on the same plant.
n.
A substance extracted from the rootstock of the Polygala Senega (Seneca root), and probably identical with polygalic acid.
n.
A genus of bitter herbs or shrubs having eight stamens and a two-celled ovary (as the Seneca snakeroot, the flowering wintergreen, etc.); milkwort.
n.
The having of a plurality of wives or husbands at the same time; usually, the marriage of a man to more than one woman, or the practice of having several wives, at the same time; -- opposed to monogamy; as, the nations of the East practiced polygamy. See the Note under Bigamy, and cf. Polyandry.
n.
A genus of plants (Polygala) of many species. The common European P. vulgaris was supposed to have the power of producing a flow of milk in nurses.
n.
The common English milkwort (Polygala vulgaris), so called from blossoming in gang week.
v. i.
To practice polygamy; to marry several wives.
n.
Single marriage; marriage with but one person, husband or wife, at the same time; -- opposed to polygamy. Also, one marriage only during life; -- opposed to deuterogamy.
a.
Destitute of function, or of an appropriate organ. Darwin.
a.
Belonging to the Polygamia; bearing both hermaphrodite and unisexual flowers on the same plant.
a.
Of or pertaining to a natural order of plants (Polygalaceae) of which Polygala is the type.
n.
The condition or state of a plant which bears both perfect and unisexual flowers.
a.
Of or pertaining to polygamy; characterized by, or involving, polygamy; having a plurality of wives; as, polygamous marriages; -- opposed to monogamous.
n. pl.
A name given by Linnaeus to file orders of plants having syngenesious flowers.
n.
One of a sect in the United States, followers of Joseph Smith, who professed to have found an addition to the Bible, engraved on golden plates, called the Book of Mormon, first published in 1830. The Mormons believe in polygamy, and their hierarchy of apostles, etc., has control of civil and religious matters.
n.
The state or habit of having more than one mate.
a.
Polygamous.