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Partial \(\lambda\)-geometries and generalized Hadamard matrices over groups. (English) Zbl 0406.05018

MSC:
05B20 Combinatorial aspects of matrices (incidence, Hadamard, etc.)
20D99 Abstract finite groups
05B25 Combinatorial aspects of finite geometries
05B30 Other designs, configurations
05B15 Orthogonal arrays, Latin squares, Room squares
05C99 Graph theory
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