Title of article :
Central groupoids, central digraphs, and zero-one matrices A satisfying A2=J
Author/Authors :
Curtis، نويسنده , , Frank and Drew، نويسنده , , John J.Z. Li، نويسنده , , Chi-Kwong and Pragel، نويسنده , , Daniel، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Abstract :
We study central groupoids, central digraphs, and zero-one matrices A satisfying A2=J. A survey of known results is given, including short proofs for some of them; new results and techniques are developed, and conjectures are settled. Open questions and new conjectures are mentioned.
Journal title :
Journal of Combinatorial Theory Series A
Journal title :
Journal of Combinatorial Theory Series A
