Bapat et al. previously described a class of nonnegative matrices dominated by a nonnegative idempotent matrix under the minus partial order. In this paper, we improve upon that description by first presenting a more general result that gives the precise structure of nonnegative matrices dominated b
Partial orders and the modular group
✍ Scribed by István Beck
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 230 KB
- Volume
- 120
- Category
- Article
- ISSN
- 0024-3795
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📜 SIMILAR VOLUMES
A symmetric, anfireflexive relation S is a comparability graph ff one can assign a transitive orientation to the edges: we obtain a partial order. We say that S is a comparability graph with constraint C, a subrelation of S, if S has a transitive orientation including C. A characterization is given
We construct a special class of noncongruence modular subgroups and curves, analogous in some ways to the usual congruence ones. The subgroups are obtained via the Burau representation, and the associated quotient curves have a natural moduli space interpretation. In fact, they are reduced Hurwitz s