Statements (24)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
modal logic system
|
| gptkbp:alsoKnownAs |
gptkb:system_K
|
| gptkbp:distribution_axiom |
□(A→B)→(□A→□B)
|
| gptkbp:firstDescribed |
1959
|
| gptkbp:hasAxiom |
necessitation rule
distribution axiom |
| gptkbp:hasKripkeSemantics |
true
|
| gptkbp:hasModalOperator |
necessity (□)
possibility (◇) |
| gptkbp:hasNoAdditionalAxiomsBeyond |
distribution axiom and necessitation rule
|
| https://www.w3.org/2000/01/rdf-schema#label |
modal logic K
|
| gptkbp:introduced |
gptkb:Saul_Kripke
|
| gptkbp:isBaseSystemFor |
gptkb:modal_logic_T
gptkb:modal_logic_S5 gptkb:modal_logic_S4 |
| gptkbp:isMinimalNormalModalLogic |
true
|
| gptkbp:KripkeFrameCondition |
no restriction on accessibility relation
|
| gptkbp:namedAfter |
gptkb:Saul_Kripke
|
| gptkbp:necessitation_rule |
if ⊢A then ⊢□A
|
| gptkbp:usedIn |
gptkb:logic
computer science |
| gptkbp:bfsParent |
gptkb:modal_logic_S5
gptkb:modal_logic_S4 |
| gptkbp:bfsLayer |
6
|