TPHOL
2002
IEEE
13 years 12 months ago
2002
IEEE
Based on an inductive definition of triangulations, a theory of undirected planar graphs is developed in Isabelle/HOL. The proof of the 5 colour theorem is discussed in some detai...
SAS
2007
Springer
14 years 1 months ago
2007
Springer
We present a framework for inductive definitions in the logic of bunched implications, BI, and formulate two sequent calculus proof systems for inductive reasoning in this framewo...