Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:appliesTo |
gptkb:Sahlqvist_formulas
|
| gptkbp:describes |
correspondence between modal formulas and first-order conditions
|
| gptkbp:field |
gptkb:logic
|
| https://www.w3.org/2000/01/rdf-schema#label |
Sahlqvist's theorem
|
| gptkbp:implies |
canonicity of Sahlqvist formulas
completeness of modal logics axiomatized by Sahlqvist formulas |
| gptkbp:namedAfter |
gptkb:Henrik_Sahlqvist
|
| gptkbp:publishedIn |
gptkb:Journal_of_Symbolic_Logic
|
| gptkbp:significance |
fundamental result in modal logic
|
| gptkbp:yearProposed |
1975
|
| gptkbp:bfsParent |
gptkb:Sahlqvist_formula
|
| gptkbp:bfsLayer |
7
|