Publication details
Well Quasi-Orders Arising from Finite Ordered Semigroups
| Authors | |
|---|---|
| Year of publication | 2022 |
| Type | Article in Proceedings |
| Conference | Developments in Language Theory: 26th International Conference, DLT 2022 |
| MU Faculty or unit | |
| Citation | |
| web | https://link.springer.com/chapter/10.1007/978-3-031-05578-2_16 |
| Doi | https://doi.org/10.1007/978-3-031-05578-2_16 |
| Keywords | Finite semigroups; Well quasi-orders; Unavoidable words |
| Description | In 1985, Bucher, Ehrenfeucht and Haussler studied derivation relations associated with a given set of context-free rules. Their research motivated a question regarding homomorphisms from the semigroup of all words onto a finite ordered semigroup. The question is which of these homomorphisms induce a well quasi-order on the set of all words. We show that this problem is decidable and the answer does not depend on the homomorphism, but it is a property of the ordered semigroup. |
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