Statements (19)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
logical formula
|
| gptkbp:consequence |
constant domain assumption
rigid designation |
| gptkbp:contrapositive |
◇∃xφ(x) → ∃x◇φ(x)
|
| gptkbp:debatedBy |
gptkb:Alonzo_Church
gptkb:Saul_Kripke gptkb:Arthur_Prior |
| gptkbp:field |
gptkb:logic
|
| https://www.w3.org/2000/01/rdf-schema#label |
Barcan formula
|
| gptkbp:introducedIn |
1946
|
| gptkbp:namedAfter |
gptkb:Ruth_Barcan_Marcus
|
| gptkbp:opposedBy |
gptkb:converse_Barcan_formula
|
| gptkbp:relatedTo |
quantified modal logic
necessity possibility domain of quantification |
| gptkbp:symbol |
∀x□φ(x) → □∀xφ(x)
|
| gptkbp:bfsParent |
gptkb:Ruth_Barcan_Marcus
|
| gptkbp:bfsLayer |
4
|