document: Some properties of Hadamard matrices coming from dihedral groups H. Kimura -LRB- 1996 -RRB- introduced a method to construct Hadamard matrices of degree 8n + 4 from the dihedral group of order 2n . In this paper we study some properties of this construction
doc_bio_tags: O O O B I O O B I O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: hadamard matrices dihedral groups