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Les cogroupes et la
construction de Utumi
Labib Haddad and Yves Sureau |
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Vol. 145 (1990), No. 1, 17–58
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Abstract |
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Among other results, a criterion is established, using multiplicators, for a cogroup to be obtainable by Utumi’s partition method starting from a D-hypergroup. Several constructions are then given of families of cogroups, finite or infinite, which are not obtainable by Utumi’s method. This answers a question raised by Stephen D. Comer (J. Algebra, 89 (1984), n∘ 2 , 397-405). |
Mathematical Subject Classification 2000
Primary: 20N20
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Milestones
Received: 5 October 1988
Published: 1 September 1990
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Authors |
| Labib Haddad | |
| Yves Sureau | |
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