Results 11 to 20 of about 46,451 (125)

A Lochs-Type Approach via Entropy in Comparing the Efficiency of Different Continued Fraction Algorithms

open access: yes, 2021
We investigate the efficiency of several types of continued fraction expansions of a number in the unit interval using a generalization of Lochs theorem from 1964. Thus, we aimed to compare the efficiency by describing the rate at which the digits of one
Lascu, Dan, Sebe, Gabriela Ileana
core   +1 more source

Continued fractions built from convex sets and convex functions [PDF]

open access: yes, 2014
In a partially ordered semigroup with the duality (or polarity) transform, it is possible to define a generalisation of continued fractions. General sufficient conditions for convergence of continued fractions with deterministic terms are provided.
Molchanov, Ilya
core   +2 more sources

Partial sums of excursions along random geodesics and volume asymptotics for thin parts of moduli spaces of quadratic differentials [PDF]

open access: yes, 2017
For a non-uniform lattice in SL(2, R), we consider excursions of a random geodesic in cusp neighborhoods of the quotient finite area hyperbolic surface or orbifold. We prove a strong law for a certain partial sum involving these excursions.
Gadre, Vaibhav
core   +1 more source

2+1 gravity, chaos and time machines [PDF]

open access: yes, 2000
2+1 gravity for spacetimes with topology RxT^2 has been much studied. We add a description of how to extend these spacetimes across a Cauchy horizon into a region where the torus becomes Lorentzian. The result is a one parameter family of tori given by a
Bengtsson, Ingemar, Braennlund, Johan
core   +3 more sources

Intermediate convergents and a metric theorem of Khinchin

open access: yes, 2009
A landmark theorem in the metric theory of continued fractions begins this way: Select a non-negative real function $f$ defined on the positive integers and a real number $x$, and form the partial sums $s_n$ of $f$ evaluated at the partial quotients $a_1,
Haynes, Alan K.
core   +1 more source

The Ostrogradsky series and related probability measures

open access: yes, 2006
We develop a metric and probabilistic theory for the Ostrogradsky representation of real numbers, i.e., the expansion of a real number $x$ in the following form: \begin{align*} x&= \sum_n\frac{(-1)^{n-1}}{q_1q_2... q_n}= &=\sum_n\frac{(-1)^{n-1}}{g_1(g_1+
Albeverio, S.   +3 more
core   +1 more source

On the finiteness and periodicity of the $p$--adic Jacobi--Perron algorithm [PDF]

open access: yes, 2019
Multidimensional continued fractions (MCFs) were introduced by Jacobi and Perron in order to obtain periodic representations for algebraic irrationals, as it is for continued fractions and quadratic irrationals.
Murru, Nadir, Terracini, Lea
core   +2 more sources

On the metric theory of the optimal continued fraction expansion [PDF]

open access: yesBulletin of the Australian Mathematical Society, 1997
Suppose kn denotes either φ(n) or φ(rn) (n = 1, 2, …) where the polynomial φ maps the natural numbers to themselves and rk denotes the kth rational prime. Let denote the sequence of convergents to a real numbers x for the optimal continued fraction expansion. Define the sequence of approximation constants byIn this paper we study the behaviour of the
openaire   +2 more sources

Metrical Diophantine approximation for quaternions [PDF]

open access: yes, 2014
Analogues of the classical theorems of Khintchine, Jarnik and Jarnik-Besicovitch in the metrical theory of Diophantine approximation are established for quaternions by applying results on the measure of general `lim sup' sets.Comment: 30 pages.
Beresnevich   +27 more
core   +2 more sources

Non-Schwarzschild black-hole metric in four dimensional higher derivative gravity: analytical approximation

open access: yes, 2017
Higher derivative extensions of Einstein gravity are important within the string theory approach to gravity and as alternative and effective theories of gravity. H. L\"u, A. Perkins, C. Pope, K. Stelle [Phys.Rev.Lett.
Kokkotas, K.   +2 more
core   +1 more source

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