Central groupoids, central digraphs, and zero-one matrices \(A\) satisfying \(A^{2}=J\). (Q1427007)
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scientific article; zbMATH DE number 2055387
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Central groupoids, central digraphs, and zero-one matrices \(A\) satisfying \(A^{2}=J\). |
scientific article; zbMATH DE number 2055387 |
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Central groupoids, central digraphs, and zero-one matrices \(A\) satisfying \(A^{2}=J\). (English)
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14 March 2004
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The authors study central groupoids, central digraphs, and zero-one matrices \(A\) satisfying \(A^2= J\). 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.
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central groupoids
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central digraphs
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zero-one matrices
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