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Related papers: A primer on measures of irrationality

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We show that measures of irrationality on very general codimension two complete intersections and very general complete intersection surfaces are multiplicative in the degrees of the defining equations. This confirms some cases of a…

Algebraic Geometry · Mathematics 2021-11-11 Nathan Chen

The main purpose of this article is to get a handle on determining how far a non-rational singularity is from being rational, or in other words, introduce a measure of the failure of a singularity being rational.

Algebraic Geometry · Mathematics 2019-04-08 Sándor J. Kovács

This paper begins the exploration of what we call measures of association between two irreducible complex projective varieties of the same dimension. The idea is to study from various points of view the minimal complexity of correspondences…

Algebraic Geometry · Mathematics 2021-12-03 Robert Lazarsfeld , Olivier Martin

We present a geometric way of describing the irrationality of a number using the area of a circular sector $A(r)$. We establish a connection between this and the continued fraction expansion of the number, and prove bounds for $A(r)$ as…

Number Theory · Mathematics 2017-01-30 Pedro Morales-Almazan

For an irreducible variety $X$ over a field $k$, the degree of irrationality $\operatorname{irr}_k X$ is the minimal degree of a dominant rational map $X \dashrightarrow \mathbb{P}_k^{\operatorname{\dim} X}$. When $X$ is a curve, this is…

Algebraic Geometry · Mathematics 2025-10-29 Adam Logan , Anthony Várilly-Alvarado , David Zureick-Brown

The quantum mechanical measurement process is considered. A hypothetical concept of irrational dynamical variables is proposed. A possible definition of measurement is discussed along with a mathematical method to calculate experimental…

Quantum Physics · Physics 2015-07-09 Christopher Engelhardt

We illustrate the power of Experimental Mathematics and Symbolic Computation to suggest irrationality proofs of natural constants, and the determination of their irrationality measures. Sometimes such proofs can be fully automated, but…

Number Theory · Mathematics 2021-05-10 Doron Zeilberger , Wadim Zudilin

We survay some nice result concerning the irrationals with a metric space point of view.Here is ofcourse nothing new may be or an expert in this field.

History and Overview · Mathematics 2007-05-23 Pratip Chakraborty

All possible types of deterministic choice behavior are classified by their degree of irrationality. This classification is performed in three steps: (1) select a benchmark of rationality, for which this degree is zero; (2) endow the set of…

Theoretical Economics · Economics 2023-03-02 Davide Carpentiere , Alfio Giarlotta , Stephen Watson

The degree of irrationality of a projective variety $X$ is defined to be the smallest degree rational dominant map to a projective space of the same dimension. For abelian surfaces, Yoshihara computed this invariant in specific cases, while…

Algebraic Geometry · Mathematics 2021-10-27 Nathan Chen

In math.NT/0307308 we defined the irrationality base of an irrational number and, assuming a stronger hypothesis than the irrationality of Euler's constant, gave a conditional upper bound on its irrationality base. Here we develop the…

Number Theory · Mathematics 2007-05-23 Jonathan Sondow

In the literature, we have various ways of proving irrationality of a real number. In this survey article, we shall emphasize on a particular criterion to prove irrationality. This is called nice approximation of a number by a sequence of…

Number Theory · Mathematics 2022-06-28 Tirthankar Bhattacharyya , Soham Bakshi , Arka Das

Measuring interdisciplinarity is a pertinent but challenging issue in quantitative studies of science. There seems to be a consensus in the literature that the concept of interdisciplinarity is multifaceted and ambiguous. Unsurprisingly,…

Digital Libraries · Computer Science 2019-12-11 Qi Wang , Jesper Wiborg Schneider

We study various measures of irrationality for hypersurfaces of large degree in projective space and other varieties. These include the least degree of a rational covering of projective space, and the minimal gonality of a covering family…

Algebraic Geometry · Mathematics 2019-02-20 Francesco Bastianelli , Pietro De Poi , Lawrence Ein , Robert Lazarsfeld , Brooke Ullery

In this paper we study the degrees of irrationality of hypersurfaces of large degree in a complex projective variety. We show that the maps computing the degrees of irrationality of these hypersurfaces factor through rational fibrations of…

Algebraic Geometry · Mathematics 2023-04-21 Jake Levinson , David Stapleton , Brooke Ullery

We obtain a new characterization for irrational numbers of constant type -- defined as irrationals with bounded partial quotients in their continued fraction expansion. The result is essential in the formulation of stability criteria for…

Mathematical Physics · Physics 2008-11-06 Manash Mukherjee , Gunther Karner

The degree of irrationality of a smooth projective variety $X$ is the minimal degree of a dominant rational map $X\dashrightarrow \mathbb{P}^{\dim X}$. We show that if an abelian surface $A$ over $\mathbb{C}$ is such that the image of the…

Algebraic Geometry · Mathematics 2019-11-04 Olivier Martin

We study asymptotics for the intergal of irrationality measure functions.

Number Theory · Mathematics 2015-08-14 Denis Shatskov

For a class of irrational numbers, depending on their Diophantine properties, we construct explicit rank-one transformations that are totally ergodic and not weakly mixing. We classify when the measure is finite or infinite. In the finite…

We prove the irrationality of some factorial series. To do so we combine methods from elementary and analytic number theory with methods from the theory of uniform distribution.

Number Theory · Mathematics 2011-05-10 Jan-Christoph Schlage-Puchta
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