Weakly maximal decidable structures

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Weakly maximal decidable structures

We prove that there exists a structure M whose monadic second order theory is decidable, and such that the elementary theory of every expansion of M by a constant is undecidable. 1991 Mathematics Subject Classification. 03B25, 03C57, 03D05.

متن کامل

Non-Maximal Decidable Structures

Given any infinite structureM with a decidable first-order theory, we give a sufficient condition in terms of the Gaifman graph of M, which ensures that M can be expanded with some non-definable predicate in such a way that the first-order theory of the expansion is still decidable. LACL Technical Report 2007-06

متن کامل

Reachability is decidable for weakly extended process rewrite systems

Process Rewrite Systems (PRS) are widely accepted as a formalism for the description of infinite-state systems. It is known that the reachability problem for PRS is decidable. The problem becomes undecidable when PRS are extended with a finitestate control unit. In this paper we show that the problem remains decidable when PRS are extended with a weak (i.e. acyclic except for self-loops) finite...

متن کامل

Definability by Weakly Deterministic Regular Expressions with Counters is Decidable

We show that weakly deterministic regular expressions with counters (WDREs) —as they are used in XML Schema— are at most exponentially larger than equivalent DFAs. As a consequence, the problem, whether a given DFA is equivalent to any WDRE, is decidable in EXPSPACE.

متن کامل

Decidable Navigation Logics for Object Structures

In this paper, we introduce decidable multimodal logics to describe and reason about navigation across object structures. The starting point of these navigation logics is the modelling of object structures as Kripke models that contain a family of deterministic accessibility relations; one for each pointer attribute. These pointer attributes are used in the logics both as first-order terms in e...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: RAIRO - Theoretical Informatics and Applications

سال: 2008

ISSN: 0988-3754,1290-385X

DOI: 10.1051/ita:2007044