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In mathematics, a complex Hadamard matrix ''H'' of size ''N'' with all its columns (rows) mutually orthogonal, belongs to the Butson-type ''H''(''q'', ''N'') if all its elements are powers of ''q''-th root of unity, :: == Existence == If ''p'' is prime then can exist only for with integer ''m'' and it is conjectured they exist for all such cases with . In general, the problem of finding all sets such that the Butson - type matrices exist, remains open. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Butson-type Hadamard matrix」の詳細全文を読む スポンサード リンク
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