Displaying similar documents to “Legendre polynomials and supercongruences”

Norm inequalities for the difference between weighted and integral means of operator differentiable functions

Silvestru Sever Dragomir (2020)

Archivum Mathematicum

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Let f be a continuous function on I and A , B 𝒮𝒜 I H , the convex set of selfadjoint operators with spectra in I . If A B and f , as an operator function, is Gateaux differentiable on [ A , B ] : = ( 1 - t ) A + t B t 0 , 1 , while p : 0 , 1 is Lebesgue integrable, then we have the inequalities 0 1 p τ f 1 - τ A + τ B d τ - 0 1 p τ d τ 0 1 f 1 - τ A + τ B d τ 0 1 τ ( 1 - τ ) | τ 1 p s d s 1 - τ - 0 τ p s d s τ | f 1 - τ A + τ B B - A d τ 1 4 0 1 | τ 1 p s d s 1 - τ - 0 τ p s d s τ | f 1 - τ A + τ B B - A d τ , where f is the Gateaux derivative of f .

Inequalities for the arithmetical functions of Euler and Dedekind

Horst Alzer, Man Kam Kwong (2020)

Czechoslovak Mathematical Journal

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For positive integers n , Euler’s phi function and Dedekind’s psi function are given by φ ( n ) = n p n p prime 1 - 1 p and ψ ( n ) = n p n p prime 1 + 1 p , respectively. We prove that for all n 2 we have 1 - 1 n n - 1 1 + 1 n n + 1 φ ( n ) n φ ( n ) ψ ( n ) n ψ ( n ) and φ ( n ) n ψ ( n ) ψ ( n ) n φ ( n ) 1 - 1 n n + 1 1 + 1 n n - 1 . The sign of equality holds if and only if n is a prime. The first inequality refines results due to Atanassov (2011) and Kannan & Srikanth (2013).

Dynamic behavior of vector solutions of a class of 2-D neutral differential systems

Arun Kumar Tripathy, Shibanee Sahu (2025)

Mathematica Bohemica

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This work deals with the analysis pertaining some dynamic behavior of vector solutions of first order two-dimensional neutral delay differential systems of the form d d t u ( t ) + p u ( t - τ ) v ( t ) + p v ( t - τ ) = a b c d u ( t - α ) v ( t - β ) . The effort has been made to study d d t x ( t ) - p ( t ) h 1 ( x ( t - τ ) ) y ( t ) - p ( t ) h 2 ( y ( t - τ ) ) + a ( t ) b ( t ) c ( t ) d ( t ) f 1 ( x ( t - α ) ) f 2 ( y ( t - β ) ) = 0 , where p , a , b , c , d , h 1 , h 2 , f 1 , f 2 C ( , ) ; α , β , τ + . We verify our results with the examples.

Ostrowski’s type inequalities for complex functions defined on unit circle with applications for unitary operators in Hilbert spaces

S.S. Dragomir (2015)

Archivum Mathematicum

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Some Ostrowski’s type inequalities for the Riemann-Stieltjes integral a b f e i t d u t of continuous complex valued integrands f : 𝒞 0 , 1 defined on the complex unit circle 𝒞 0 , 1 and various subclasses of integrators u : a , b 0 , 2 π of bounded variation are given. Natural applications for functions of unitary operators in Hilbert spaces are provided as well.

Global analytic and Gevrey surjectivity of the Mizohata operator D 2 + i x 2 2 k D 1

Lamberto Cattabriga, Luisa Zanghirati (1990)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

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The surjectivity of the operator D 2 + i x 2 2 k D 1 from the Gevrey space E s R 2 , s 1 , onto itself and its non-surjectivity from E s R 3 to E s R 3 is proved.

Improved upper bounds for nearly antipodal chromatic number of paths

Yu-Fa Shen, Guo-Ping Zheng, Wen-Jie HeK (2007)

Discussiones Mathematicae Graph Theory

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For paths Pₙ, G. Chartrand, L. Nebeský and P. Zhang showed that a c ' ( P ) n - 2 2 + 2 for every positive integer n, where ac’(Pₙ) denotes the nearly antipodal chromatic number of Pₙ. In this paper we show that a c ' ( P ) n - 2 2 - n / 2 - 10 / n + 7 if n is even positive integer and n ≥ 10, and a c ' ( P ) n - 2 2 - ( n - 1 ) / 2 - 13 / n + 8 if n is odd positive integer and n ≥ 13. For all even positive integers n ≥ 10 and all odd positive integers n ≥ 13, these results improve the upper bounds for nearly antipodal chromatic number of Pₙ.

Inequalities Of Lipschitz Type For Power Series In Banach Algebras

Sever S. Dragomir (2015)

Annales Mathematicae Silesianae

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Let [...] f(z)=∑n=0∞αnzn f ( z ) = n = 0 α n z n be a function defined by power series with complex coefficients and convergent on the open disk D (0, R) ⊂ ℂ, R > 0. For any x, y ∈ ℬ, a Banach algebra, with ‖x‖, ‖y‖ < R we show among others that [...] ‖f(y)−f(x)‖≤‖y−x‖∫01fa′(‖(1−t)x+ty‖)dt f ( y ) - f ( x ) y - x 0 1 f a ' ( ( 1 - t ) x + t y ) d t where [...] fa(z)=∑n=0∞|αn| zn f a ( z ) = n = 0 | α n | z n . Inequalities for the commutator such as [...] ‖f(x)f(y)−f(y)f(x)‖≤2fa(M)fa′(M)‖y−x‖, f ( x ) f ( y ) - f ( y ) f ( x ) 2 f a ( M ) f a ' ( M ) y - x , if ‖x‖, ‖y‖ ≤ M < R, as well as some inequalities of Hermite–Hadamard type are also provided. ...

q -analogues of two supercongruences of Z.-W. Sun

Cheng-Yang Gu, Victor J. W. Guo (2020)

Czechoslovak Mathematical Journal

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We give several different q -analogues of the following two congruences of Z.-W. Sun: k = 0 ( p r - 1 ) / 2 1 8 k 2 k k 2 p r ( mod p 2 ) and k = 0 ( p r - 1 ) / 2 1 16 k 2 k k 3 p r ( mod p 2 ) , where p is an odd prime, r is a positive integer, and ( m n ) is the Jacobi symbol. The proofs of them require the use of some curious q -series identities, two of which are related to Franklin’s involution on partitions into distinct parts. We also confirm a conjecture of the latter author and Zeng in 2012.

Open and solved problems concerning polarized partition relations

Shimon Garti, Saharon Shelah (2016)

Fundamenta Mathematicae

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We list some open problems concerning the polarized partition relation. We solve a couple of them, by showing that for every limit non-inaccessible ordinal α there exists a forcing notion ℙ such that the strong polarized relation α + 1 α α + 1 α 2 1 , 1 holds in V .

On the gaps between q -binomial coefficients

Florian Luca, Sylvester Manganye (2021)

Communications in Mathematics

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In this note, we estimate the distance between two q -nomial coefficients n k q - n ' k ' q , where ( n , k ) ( n ' , k ' ) and q 2 is an integer.

Some distribution results on generalized ballot problems

Jagdish Saran, Kanwar Sen (1985)

Aplikace matematiky

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Suppose that in a ballot candidate A scores a votes and candidate B scores b votes and that all possible a + b a voting sequences are equally probable. Denote by α r and by β r the number of votes registered for A and for B , respectively, among the first r votes recorded, r = 1 , , a + b . The purpose of this paper is to derive, for a b - c , the probability distributions of the random variables defined as the number of subscripts r = 1 , , a + b for which (i) α r = β r - c , (ii) α r = β r - c but α r - 1 = β r - 1 - c ± 1 , (iii) α r = β r - c but α r - 1 = β r - 1 - c ± 1 and α r + 1 = β r + 1 - c ± 1 , where c = 0 , ± 1 , ± 2 , .

An empirical almost sure central limit theorem under the weak dependence assumptions and its application to copula processes

Marcin Dudziński (2017)

Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica

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Let: 𝐘 = 𝐘 i , where 𝐘 i = Y i , 1 , . . . , Y i , d , i = 1 , 2 , , be a d -dimensional, identically distributed, stationary, centered process with uniform marginals and a joint cdf F , and F n 𝐱 : = 1 n i = 1 n 𝕀 Y i , 1 x 1 , , Y i , d x d denote the corresponding empirical cdf. In our work, we prove the almost sure central limit theorem for an empirical process B n = n F n - F under some weak dependence conditions due to Doukhan and Louhichi. Some application of the established result to copula processes is also presented.