Some descending chains of incomplete modal logics
β Scribed by Ming Xu
- Publisher
- Springer Netherlands
- Year
- 1991
- Tongue
- English
- Weight
- 769 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-3611
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract C5.Ο is obtained by adding, schematically, to the strictβimplicational fragment C5 of S5 the axiom ((__p__ β __q__) β (__q__ β __p__)) β (__q__ β __p__). This paper presents a fully general proof that neither C5.Ο nor any of a descending chain of its extensions is complete with respect
The LA-logics ("logics with Local Agreement") are polymodal logics deΓΏned semantically such that at any world of a model, the sets of successors for the di erent accessibility relations can be linearly ordered and the accessibility relations are equivalence relations. In a previous work, we have sho