Irrationality measure

id: irrationality-measure-206-2636664
title: Irrationality measure
text: An irrationality measure of a real number α is a measure of how "closely" it can be approximated by rationals. If a function f, defined for positive real numbers, strictly decreasing in both x and λ is given, consider the following inequality: 0 < | α − p q | < f for a given real number α ∈ R and rational numbers p q with p ∈ Z, q ∈ Z +. Define M as the set of all λ ∈ R + for which only finitely many p q exist, such that the inequality is satisfied. Then λ = inf M is called an irrationality meas
brand slug: wiki
category slug: encyclopedia
description: Function that quantifies how near a given real number is to being rational.
original url: https://en.wikipedia.org/wiki/Irrationality_measure
date created: 2006-07-14T22:09:40Z
date modified: 2024-09-10T15:37:28Z
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