Artículo de revista
Order-Invariant Types and their Applications
Fecha
2016Registro en:
Logical Methods in Computer Science Vol. 12(1:9)2016, pp. 1–17
10.2168/MCS-12(1:6)2016
Autor
Barceló Baeza, Pablo
Libkin, Leonid
Institución
Resumen
Our goal is to show that the standard model-theoretic concept of types can be applied in the study of order-invariant properties, i.e., properties definable in a logic in the presence of an auxiliary order relation, hut not actually dependent on that order relation. This is somewhat surprising since order-invariant properties are more of a. combinatorial rather than a logical object. We provide two applications of this notion. One is a proof, from the basic principles, of a, theorem by Courcelle stating that over trees, order-invariant NISO properties are expressible in IMO