# Sahlqvist theory for impossible worlds

> Research article (Journal of Logic and Computation, 2016) · cited 37× · AI/ML

**Wikidata**: [openalex:W2334111423](https://www.wikidata.org/wiki/openalex:W2334111423)  
**Source**: https://4ort.xyz/entity/sahlqvist-theory-for-impossible-worlds