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On Hadamard groups. II. (English) Zbl 0808.05016
Summary: This is a continuation of Noboru Ito [J. Algebra 168, No. 3, 981- 987 (1994)]. A relation between Hadamard difference sets and Hadamard groups is clarified, and Hadamard groups of Paley type are constructed.

MSC:
05B10 Combinatorial aspects of difference sets (number-theoretic, group-theoretic, etc.)
20D60 Arithmetic and combinatorial problems involving abstract finite groups
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