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Gauss's arithmetic-geometric mean (AGM) which is described by two variables iteration $(a_n, b_n)\rightarrow (a_{n+1}, b_{n+1})$ by $a_{n+1}=(a_n+b_n)/2,\ b_{n+1}=\sqrt{a_nb_n}$. We extend it to three variables iteration $(a_n, b_n,…

Classical Analysis and ODEs · Mathematics 2024-06-21 Kiyoshi Sogo

In this paper, we define a version of the arithmetic-geometric mean (AGM) function for arbitrary finite fields $\mathbb{F}_q$, and study the resulting AGM graph with points $(a,b) \in \mathbb{F}_q \times \mathbb{F}_q$ and directed edges…

Number Theory · Mathematics 2024-10-24 June Kayath , Connor Lane , Ben Neifeld , Tianyu Ni , Hui Xue

The article shows how two choices are possible whenever computing the geometric mean, and the repetition of this process can in general yield 2-to-the power N different values when the choices are compounded in the first N steps of…

Classical Analysis and ODEs · Mathematics 2023-06-13 François Lamarche , Helmut Ruhland

In this note we present a refinement of the AM-GM inequality, and then we estimate in a special case the typical size of the improvement.

Classical Analysis and ODEs · Mathematics 2009-10-30 J. M. Aldaz

In the current note, we investigate the mathematical relations among the weighted arithmetic mean-geometric mean (AM-GM) inequality, the H\"{o}lder inequality and the weighted power-mean inequality. Meanwhile, the proofs of mathematical…

Functional Analysis · Mathematics 2021-03-16 Yongtao Li , Xian-Ming Gu , Jianxing Zhao

A binary mean operation m(x,y) is said to be compatible with a semigroup law *, if * satisfies the Gauss' functional equation m(x,y) * m(x,y) = x * y for all x, y. Thus the arithmetic mean is compatible with the group addition in the set of…

Group Theory · Mathematics 2022-12-22 R. Padmanabhan , Alok Shukla

We give an upper bound for the weighted geometric mean using the weighted arithmetic mean and the weighted harmonic mean. We also give a lower bound for the weighted geometric mean. These inequalities are proven for two invertible positive…

Functional Analysis · Mathematics 2014-10-21 Shigeru Furuichi

In the paper, the authors establish, by using Cauchy integral formula in the theory of complex functions, an integral representation for the geometric mean of $n$ positive numbers. From this integral representation, the geometric mean is…

Classical Analysis and ODEs · Mathematics 2014-03-07 Feng Qi , Xiao-Jing Zhang , Wen-Hui Li

The usual dictionary between geometry and commutative algebra is not appropriate for Arithmetic geometry because addition is a singular operation at the "Real prime". We replace Rings, with addition and multiplication, by Props (=strict…

Category Theory · Mathematics 2024-02-12 Shai Haran

The classical AM-GM inequality has been generalized in a number of ways. Generalizations which incorporate variance appear to be the most useful in economics and finance, as well as mathematically natural. Previous work leaves unanswered…

Classical Analysis and ODEs · Mathematics 2015-08-28 Burt Rodin

In the paper, we provide an alternative and united proof of a double inequality for bounding the arithmetic-geometric mean.

Classical Analysis and ODEs · Mathematics 2010-07-12 Feng Qi , Anthony Sofo

Recht and R\'{e} introduced the noncommutative arithmetic geometric mean inequality (NC-AGM) for matrices with a constant depending on the degree $d$ and the dimension $m$. In this paper we prove AGM inequalities with a dimension-free…

Operator Algebras · Mathematics 2017-03-03 Wafaa Albar , Marius Junge , Mingyu Zhao

In this paper, we present new structures and results on the set $\M_\D$ of mean functions on a given symmetric domain $\D$ of $\mathbb{R}^2$. First, we construct on $\M_\D$ a structure of abelian group in which the neutral element is simply…

Number Theory · Mathematics 2010-02-26 Bakir Farhi

We give an account of the complex Arithmetic-Geometric Mean (AGM), as first studied by Gauss, together with details of its relationship with the theory of elliptic curves over $\C$, their period lattices and complex parametrisation. As an…

Number Theory · Mathematics 2015-10-28 John E. Cremona , Thotsaphon Thongjunthug

We study the symmetrized noncommutative arithmetic geometric mean inequality introduced(AGM) by Recht and R\'{e} $$ \|\frac{(n-d)!}{n!}\sum\limits_{{ j_1,...,j_d \mbox{ different}}…

Operator Algebras · Mathematics 2018-03-08 Wafaa Albar , Marius Junge , Mingyu Zhao

We shall give a refinement of the arithmetic-geometric mean inequality.

Classical Analysis and ODEs · Mathematics 2010-08-23 Shigeru Furuichi

We consider algebras of $m\times m\times m$-cubic matrices (with $m=1,2,\dots$). Since there are several kinds of multiplications of cubic matrices, one has to specify a multiplication first and then define an algebra of cubic matrices…

Rings and Algebras · Mathematics 2016-09-13 M. Ladra , U. A. Rozikov

The geometric mean of two matrices is considered and analyzed from a computational viewpoint. Some useful theoretical properties are derived and an analysis of the conditioning is performed. Several numerical algorithms based on different…

Numerical Analysis · Mathematics 2012-01-04 Bruno Iannazzo

In this paper, we generalize the ALM-procedure introduced by Ando, Li, and Mathias for extending operator geometric means to multiple variables. We prove that the generalized procedure preserves all the properties required by the axioms of…

Functional Analysis · Mathematics 2025-06-17 Dante Hoshina , Shuhei Wada

The umbral restyling of hypergeometric functions is shown to be a useful and efficient approach in simplifying the associated computational technicalities. In this article, the authors provide a general introduction to the umbral version of…

Classical Analysis and ODEs · Mathematics 2024-01-31 Giuseppe Dattoli , Mehnaz Haneef , Subuhi Khan , Silvia Licciardi
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