Publication details
The omega-inequality problem for concatenation hierarchies of star-free languages
| Authors | |
|---|---|
| Year of publication | 2018 |
| Type | Peer-reviewed scientific article |
| Magazine / Source | Forum Mathematicum |
| MU Faculty or unit | |
| Citation | |
| web | https://www.degruyter.com/view/j/form.ahead-of-print/forum-2016-0028/forum-2016-0028.xml |
| Doi | https://doi.org/10.1515/forum-2016-0028 |
| Keywords | Pseudovariety; relatively free profinite semigroup; ordered monoid; concatenation hierarchy; Straubing–Thérien hierarchy |
| Description | The problem considered in this paper is whether an inequality of omega-terms is valid in a given level of a concatenation hierarchy of star-free languages. The main result shows that this problem is decidable for all (integer and half) levels of the Straubing-Therien hierarchy. |
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