An approximation property of quadratic irrationals
Takao Komatsu (2002)
Bulletin de la Société Mathématique de France
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Let be irrational. Several authors studied the numbers where is a positive integer and denotes the set of all real numbers of the form with restricted integer coefficients . The value of was determined for many particular Pisot numbers and for the golden number. In this paper the value of is determined for irrational numbers , satisfying with a positive integer .