Diophantine approximation

Diophantine approximation

In number theory, the study of Diophantine approximation deals with the approximation of real numbers by rational numbers. It is named after Diophantus of Alexandria. The first problem was to know how well a real number can be approximated by rational numbers. For this problem, a rational number a/b is a "good" approximation of a real number α if the absolute value of the difference between a/b and α may not decrease if a/b is replaced by another rational number with a smaller denominator. This problem was solved during the 18th century by means of continued fractions. Knowing the "best" approximations of a given number, the main problem of the field is to find sharp upper and lower bounds of the above difference, expressed as a function of the denominator. It appears that these bounds depend on the nature of the real numbers to be approximated: the lower bound for the approximation of a rational number by another rational number is larger than the lower bound for algebraic numbers, which is itself larger than the lower bound for all real numbers. Thus a real number that may be better approximated than the bound for algebraic numbers is certainly a transcendental number. This knowledge enabled Liouville, in 1844, to produce the first explicit transcendental number. Later, the proofs that π and e are transcendental were obtained by a similar method. Diophantine approximations and transcendental number theory are very close areas that share many theorems and methods. Diophantine approximations also have important applications in the study of Diophantine equations. The 2022 Fields Medal was awarded to James Maynard for his work on Diophantine approximation. (Wikipedia).

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Alexander Gorodnik - Diophantine approximation and flows on homogeneous spaces (Part 3)

The fundamental problem in the theory of Diophantine approximation is to understand how well points in the Euclidean space can be approximated by rational vectors with given bounds on denominators. It turns out that Diophantine properties of points can be encoded using flows on homogeneous

From playlist École d’été 2013 - Théorie des nombres et dynamique

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Alexander Gorodnik - Diophantine approximation and flows on homogeneous spaces (Part 2)

The fundamental problem in the theory of Diophantine approximation is to understand how well points in the Euclidean space can be approximated by rational vectors with given bounds on denominators. It turns out that Diophantine properties of points can be encoded using flows on homogeneous

From playlist École d’été 2013 - Théorie des nombres et dynamique

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Alexander Gorodnik - Diophantine approximation and flows on homogeneous spaces (Part 1)

The fundamental problem in the theory of Diophantine approximation is to understand how well points in the Euclidean space can be approximated by rational vectors with given bounds on denominators. It turns out that Diophantine properties of points can be encoded using flows on homogeneous

From playlist École d’été 2013 - Théorie des nombres et dynamique

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Introduction to Solving Linear Diophantine Equations Using Congruence

This video defines a linear Diophantine equation and explains how to solve a linear Diophantine equation using congruence. mathispower4u.com

From playlist Additional Topics: Generating Functions and Intro to Number Theory (Discrete Math)

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We explore the solvability of the linear Diophantine equation ax+by=c

From playlist Divisibility and the Euclidean Algorithm

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From playlist Number Theory

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From playlist Diophantine Equations - Elementary Number Theory

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Approximating Irrational Numbers (Duffin-Schaeffer Conjecture) - Numberphile

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From playlist James Maynard on Numberphile

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Dynamical systems, fractals and diophantine approximations – Carlos Gustavo Moreira – ICM2018

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Intrinsic Diophantine approximation (Lecture 3) by Amos Nevo

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From playlist Smooth And Homogeneous Dynamics

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S-arithmetic Diophantine approximation - Shreyasi Datta

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Intrinsic Diophantine approximation (Lecture 2) by Amos Nevo

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From playlist Smooth And Homogeneous Dynamics

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Osama Khalil: Diophantine approximation on fractals and homogeneous flows

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From playlist Conference: Dynamics on homogeneous spaces

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Theory of numbers: Linear Diophantine equations

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From playlist Theory of numbers

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Diophantine approximation and Diophantine definitions - Héctor Pastén Vásquez

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From playlist Short Talks by Postdoctoral Members

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