Diophantine approximation: Difference between revisions

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== Best Diophantine approximations of a real number ==
{{main|ContinuedSimple continued fraction#Best rational approximations|Irrationality measure}}
 
Given a real number {{math|''α''}}, there are two ways to define a best Diophantine approximation of {{math|''α''}}. For the first definition,<ref name="Khinchin 1997 p.21">{{harvnb|Khinchin|1997|p=21}}</ref> the rational number {{math|''p''/''q''}} is a ''best Diophantine approximation'' of {{math|''α''}} if