Results 61 to 70 of about 54,740 (185)

Generalized Riemann hypotheses: sufficient and equivalent criteria [PDF]

open access: yes, 2010
This paper presents new sufficient and equivalent conditions for the generalized version of the Riemann Hypothesis. The paper derives also statements and remarks concerning zero-free regions, modified Hadamard-product formulas and the behaviour of ...
Schipani, Davide
core  

Hadamard Products and Tilings

open access: yes, 2009
Louis W. Shapiro gave a combinatorial proof of a bilinear generating function for Chebyshev polynomials equivalent to the formula 1/(1-ax-x^2) * 1/(1-bx-x^2) = (1-x^2)/(1-abx-(2+a^2+b^2)x^2 -abx^3+x^4), where * denotes the Hadamard product. In a similar way, by considering tilings of a 2 by n rectangle with 1 by 1 and 1 by 2 bricks in the top row, and ...
openaire   +3 more sources

Relativity and Hadamard products

open access: yes, 2023
A key feature of Hadamard products is used to simplify relativistic matrix derivations.
openaire   +1 more source

Potential output purity of completely positive maps

open access: yes, 2017
The notion of potential output purity of a completely positive map is introduced as a generalization of the regularized output purity. An upper bound is derived for this quantity, and for several classes of maps (including CQ, QC and Hadamard channels ...
King, Christopher
core   +1 more source

Subordinating results for a class of analytic functions defined by Hadamard product and Atshan and Rafid operator [PDF]

open access: yesSurveys in Mathematics and its Applications, 2021
In this paper, we defined a class of analytic functions defined by Hadamard product and Atshan and Rafid operator and obtained some subordinating results for functions in this class.
M. K. Aouf   +2 more
doaj  

Algebras of frequently hypercyclic vectors

open access: yes, 2019
We show that the multiples of the backward shift operator on the spaces $\ell_{p}$, $1\leq ...
Falcó, Javier, Grosse-Erdmann, Karl-G.
core   +1 more source

Hadamard Product Concerning Certain Meromorphic Functions

open access: yesLe Matematiche, 2015
In this paper the authors introduced a new generalized differintegral operator for meromorphic univalent functions in U* = {z : z ∈ C, 0 < |z| < 1}.
Rabha M. El-Ashwah, Maslina Darus
doaj  

Hadamard States From Light-like Hypersurfaces

open access: yes, 2017
This book provides a rather self-contained survey of the construction of Hadamard states for scalar field theories in a large class of notable spacetimes, possessing a (conformal) light-like boundary.
Dappiaggi, Claudio   +2 more
core   +1 more source

Some integral inequalities of Hermite-Hadamard type for multiplicatively preinvex functions

open access: yesAIMS Mathematics, 2020
In this paper, some integral inequalities of Hermite-Hadamard type for multiplicatively preinvex functions are established. Also, new inequalities involving multiplicative integrals are obtained for product and quotient of preinvex and multiplicatively ...
Serap Özcan
doaj   +1 more source

Product of four Hadamard matrices

open access: yesJournal of Combinatorial Theory, Series A, 1992
The authors show the following interesting theorem on Hadamard matrices: If there exist Hadamard matrices of order \(4m\), \(4n\), \(4p\) and \(4q\), then there exists an Hadamard matrix of order \(16mnpq\).
Craigen, R.   +2 more
openaire   +2 more sources

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