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          |  | Volume 10, Issue 3, Article 62 |  |   
          |  |  |  |  |  |  | A Matrix Inequality for Möbius Functions
 
 
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          |  |  | Authors: | Olivier Bordellčs, Benoit Cloitre, |  |   
          |  |  | Keywords: | Determinants, Dirichlet convolution, Möbius functions, Singular values. |  |   
          |  |  | Date Received: | 24/11/2008 |  |   
          |  |  | Date Accepted: | 27/03/2009 |  |   
          |  |  | Subject Codes: | 15A15, 11A25, 15A18, 11C20. |  |   
          |  |  | Editors: | László Tóth, |  |   
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          |  |  | Abstract: |  The aim of this note is the study of an integer matrix whose determinant is related to the Möbius function. We derive a number-theoretic inequality involving sums of a certain class of Möbius functions and obtain a sufficient condition for the Riemann hypothesis depending on an integer triangular matrix. We also provide an alternative proof of Redheffer's theorem based upon a LU decomposition of the Redheffer's matrix.
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