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Structure and randomness in arithmetic settings Wong, Erick Bryce
Abstract
We study questions in three arithmetic settings, each of which carries aspects of random-like behaviour. In the setting of arithmetic functions, we establish mild conditions under which the tuple of multiplicative functions [f₁, f₂, …, f_d ], evaluated at d consecutive integers n+1, …, n+d, closely approximates points in R^d for a positive proportion of n; we obtain a further generalization which allows these functions to be composed with various arithmetic progressions. Secondly, we examine the eigenvalues of random integer matrices, showing that most matrices have no rational eigenvalues; we also identify the precise distributions of both real and rational eigenvalues in the 2 × 2 case. Finally, we consider the set S(k) of numbers represented by the quadratic form x² + ky², showing that it contains infinitely many strings of five consecutive integers under many choices of k; we also characterize exactly which numbers can appear as the difference of two consecutive values in S(k).
Item Metadata
Title |
Structure and randomness in arithmetic settings
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2012
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Description |
We study questions in three arithmetic settings, each of which carries aspects of random-like behaviour.
In the setting of arithmetic functions, we establish mild conditions under which the tuple of multiplicative functions [f₁, f₂, …, f_d ], evaluated at d consecutive integers n+1, …, n+d, closely approximates points in R^d for a positive proportion of n; we obtain a further generalization which allows these functions to be composed with various arithmetic progressions.
Secondly, we examine the eigenvalues of random integer matrices, showing that most matrices have no rational eigenvalues; we also identify the precise distributions of both real and rational eigenvalues in the 2 × 2 case.
Finally, we consider the set S(k) of numbers represented by the quadratic form x² + ky², showing that it contains infinitely many strings of five consecutive integers under many choices of k; we also characterize exactly which numbers can appear as the difference of two consecutive values in S(k).
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Genre | |
Type | |
Language |
eng
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Date Available |
2012-08-09
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0072975
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2012-11
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Campus | |
Scholarly Level |
Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International