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Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:field |
formal language theory
mathematical linguistics |
| https://www.w3.org/2000/01/rdf-schema#label |
Bar-Hillel theorem
|
| gptkbp:namedAfter |
gptkb:Yehoshua_Bar-Hillel
|
| gptkbp:publishedIn |
gptkb:Bulletin_of_the_Research_Council_of_Israel
|
| gptkbp:relatedTo |
gptkb:Chomsky_hierarchy
context-free language |
| gptkbp:state |
context-free languages are not closed under intersection or complementation
context-free languages are closed under union, concatenation, and Kleene star |
| gptkbp:yearProposed |
1961
|
| gptkbp:bfsParent |
gptkb:Yehoshua_Bar-Hillel
|
| gptkbp:bfsLayer |
3
|