O'Reilly logo

Graph Structure and Monadic Second-Order Logic by Joost Engelfriet, Bruno Courcelle

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

8.9  VR-equational sets of terms and words

Having characterized the MS-transductions of terms, we can apply the Equationality Theorem (Theorem 7.36) to obtain an automata-theoretic characterization of the VR-equational sets of terms. A set of terms L image T (F) is defined to be VR-equational if the set of (F,[ρ(F)])-labeled graphs {Syn(t) | t L} is VR-equational. A similar definition holds for sets of words, viewed as unary trees. Since t=Syn(t) for every ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required