On Hadamard matrices at roots of unity
Teodor Banica, Jean-Marc Schlenker
TL;DR
This paper discusses Hadamard matrices at roots of unity, but does not present new results as the main findings are already known since 2000.
Contribution
The paper clarifies that its main result is not new and has been previously established by Lam and Leung in 2000.
Findings
Main result already known since 2000
No new contributions provided
Clarification of existing literature
Abstract
This paper has been withdrawn by the authors, the main result being known since Lam and Leung, J. Algebra 2000.
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Taxonomy
Topicsgraph theory and CDMA systems · Advanced Topics in Algebra · Advanced Algebra and Logic