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This note is an (exact) copy of the report of Jaak Peetre, "Banach Couples. I. Elementary Theory". Published as Technical Report, Lund (1971). Some more recent general references have been added and some references updated though

Functional Analysis · Mathematics 2023-03-14 Jaak Peetre , Per Nilsson

This note is an (exact) copy of the report of Jaak Peetre, "H-infinity and Complex Interpolation". Published as Technical Report, Lund (1981). Some more recent general references have been added, some references updated though (in italics)…

Functional Analysis · Mathematics 2025-01-17 Jaak Peetre , Per G. Nilsson

This is an English translation of the following paper, published several years ago: Nikonorov Yu.G., Nikonorova Yu.V. Generalized Popoviciu's problem (Russian), Tr. Rubtsovsk. Ind. Inst., 7, 229-232 (2000), Zbl. 0958.51021. All inserted…

History and Overview · Mathematics 2018-06-12 Yu. G. Nikonorov , Yu. V. Nikonorova

In this paper we prove a generalization of famous Larchr's theorem concerning good lattice points.

Number Theory · Mathematics 2012-03-15 Dmitry Ushanov

We propose a slight correction and a slight improvement on the main result contained in "A lecture on Classical KAM Theorem" by J. P{\"o}schel.

Dynamical Systems · Mathematics 2020-06-09 Abed Bounemoura

We generalize Romanoff's theorem. Also, we obtain a result on sums related to Euler's totient function.

Number Theory · Mathematics 2024-03-05 Artyom Radomskii

A brief overview of publications in approximation theory of functions known to the author and connected with scientific publications by V.~K.~Dzyadyk (1919--1998).

Classical Analysis and ODEs · Mathematics 2019-03-27 R. M. Trigub

We improve on Gonek-Montgomery's quantitative version of Kronecker's approximation theorem.

Number Theory · Mathematics 2024-05-14 Daria Maksimova

The object of this paper is to generalize a theorem on the binomial coefficient [4] to the case in an arithmetic progression. We will also give a slightly stronger result than Langevin's [2].

General Mathematics · Mathematics 2009-09-15 Shaohua Zhang

In this paper, by using analytical methods we obtain a generalization of the famous Kodaira embedding theorem.

Differential Geometry · Mathematics 2019-09-27 Chao Li , Xi Zhang , QiZhi Zhao

A great number of articles widen a known scientific result $P(a)$ (such as: a theorem, an inequality, or a math/physics/chemical etc. proposition or formula) by a simple recurrence procedure and using, in the proof, the proposition $P(a)$…

General Mathematics · Mathematics 2010-03-29 Florentin Smarandache

The purpose of this paper is to generalize a very famous result on products of normal operators, due to I. Kaplansky. The context of generalization is that of bounded hyponormal and unbounded normal operators on complex separable Hilbert…

Functional Analysis · Mathematics 2014-03-04 Abdelkader Benali , Mohammed Hichem Mortad

We survey the classical results of the Dirichlet Approximation Theorem.

Classical Analysis and ODEs · Mathematics 2007-05-23 Yong-Cheol Kim

This article has a twofold purpose. On the one hand I would like to draw attention to some nice exercises on the Kepler laws, due to Otto Laporte from 1970. Our discussion here has a more geometric flavour than the original analytic…

Symplectic Geometry · Mathematics 2025-03-03 Gert Heckman

The purpose of this paper is to present a generalization of Forelli's theorem. In particular, we prove an all dimensional version of the two-dimensional theorem of Chirka of 2005.

Complex Variables · Mathematics 2011-09-15 Jae-Cheon Joo , Kang-Tae Kim , Gerd Schmalz

The paper gives the main lines of a general theory for physical measurements.

Quantum Physics · Physics 2007-05-23 Ioan Sturzu

In this paper we introduce generalised Markov numbers and extend the classical Markov theory for the discrete Markov spectrum to the case of generalised Markov numbers. In particular we show recursive properties for these numbers and find…

Number Theory · Mathematics 2018-09-07 Oleg Karpenkov , Matty van-Son

In this short note, we point out a mistake in G.Cybenko's proof of his version of the universal approximation theorem which has been widely cited. This mistake might not be easily fixable along the idea of his proof and it also leads to an…

Classical Analysis and ODEs · Mathematics 2025-12-08 Kun Wang

In this short note we have proved an enhanced version of a theorem of Lorentz [1] and its generalization to the multivariate case which gives a non- uniform estimate of degree of approximation by a polynomial with positive coefficients. The…

Classical Analysis and ODEs · Mathematics 2016-11-30 Zhong Guan , Tao Wang
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