# The MSO+U Theory of (N,<) Is Undecidable

> Research article (DROPS (Schloss Dagstuhl – Leibniz Center for Informatics), 2016) · cited 12× · AI/ML

**Wikidata**: [openalex:W2963272841](https://www.wikidata.org/wiki/openalex:W2963272841)  
**Source**: https://4ort.xyz/entity/the-mso-u-theory-of-n-lt-is-undecidable