Related papers: On Hadamard matrices at roots of unity
The paper has been withdrawn by the author.
This paper has been withdrawn, see the replacement arXiv:1302.6670.
This paper has been withdrawn by the authors.
This paper has been withdrawn by the author because he was informed of the following paper: Cummins C. and King R. C., An algorithm for calculating characters of Hecke algebras Hn (q) of tyoe An-1 when q is a root of unity, Comm. Algebra 21…
This paper has been withdrawn by the author due to a crucial argument error at p.10.
This paper has been withdrawn by the author [arXiv admin].
This paper has been withdrawn by the authors due to the fact that the conjecture has indeed already long been established.
This paper has been withdrawn by the author due to that the main results and approaches are closedly parallel to the ones in Lie algebra case.
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We give some very interesting matrices which are orthogonal over groups and, as far as we know, referenced, but in fact undocumented. This note is not intended to be published but available for archival reasons.
In this note, while giving an overview of the state of art of the well known Hadamard conjecture, which is more than a century old and now it has been established by using the methods given in the two papers by Mohan et al [6,7].
This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.
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This paper has been withdrawn by the author for further investigation.
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An Hadamard matrix is a square matrix $H\in M_N(\pm1)$ whose rows and pairwise orthogonal. More generally, we can talk about the complex Hadamard matrices, which are the square matrices $H\in M_N(\mathbb C)$ whose entries are on the unit…
This paper has been withdrawn.
This paper has been withdrawn by the author.
This paper has been withdrawn by the author in favor of a stronger result proven by the author with R. Frank and T. Weidl in arXiv:0707.0998