42 search results - page 2 / 9 » The proof monad |
JCSS
2000
13 years 5 months ago
2000
It is a well-known result of Fagin that the complexity class NP coincides with the class of problems expressible in existential second-order logic ( 1 1), which allows sentences c...
ICFP
2007
ACM
14 years 5 months ago
2007
ACM
We present a pair of reasoning principles, definition and proof by rigid induction, which can be seen as proper generalizations of lazy-datatype induction to monadic effects other...
JCT
2007
13 years 5 months ago
2007
We prove that one can express the vertex-minor relation on finite undirected graphs by formulas of monadic second-order logic (with no edge set quantification) extended with a p...
ASIAN
2006
Springer
13 years 9 months ago
2006
Springer
Interesting properties of programs can be expressed using contextual equivalence. The latter is difficult to prove directly, hence (pre-)logical relations are often used as a tool ...
CSL
2010
Springer
13 years 6 months ago
2010
Springer
We present a new algorithm for model-checking weak monadic second-order logic on inductive structures, a class of structures of bounded clique width. Our algorithm directly manipul...