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Paper   IPM / M / 16325
School of Mathematics
  Title:   Disjoint weighing matrices
  Author(s):  Behruz Tayfeh-Rezaie (Joint with H. Kharaghani and Sh. Suda)
  Status:   To Appear
  Journal: J. Algebraic Combin.
  Supported by:  IPM
The notion of disjoint weighing matrices is introduced as a generalization of orthogonal designs. A recursive construction along with a computer search lead to some infinite classes of disjoint weighing matrices, which in turn are shown to form commutative association schemes with 3 or 4 classes.

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