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Temporal Logic
Previous temporal database Next Tempura. temporal logic. There aretwo types of temporal logic used branching time and linear time.
http://burks.brighton.ac.uk/burks/foldoc/33/116.htm

Extractions: The Free Online Dictionary of Computing ( http://foldoc.doc.ic.ac.uk/ dbh@doc.ic.ac.uk Previous: temporal database Next: Tempura logic predicate calculus which includes notation for arguing about *when* statements are true. Time is discrete and extends indefinitely into the future. Three prefix operators, represented by a circle, square and diamond mean "is true at the next time instant", "is true from now on" and "is eventually true". x U y means x is true until y is true. x P y means x precedes y. There are two types of formula: "state formulae" about things true at one point in time, and "path formulae" about things true for a sequence of steps. An example of a path formula is "x U y", and example of a state formula is "next x" or a simple atomic formula such at "waiting". "true until" in this context means that a state formula holds at every point in time up to a point when another formula holds. "x U y" is the "strong until" and implies that there is a time when y is true. "x W y" is the "weak until" in which it is not necessary that y holds eventually. There are two types of temporal logic used: branching time and linear time. The basic propositional temporal logic cannot differentiate between the two, though. Linear time considers only one possible future, in branching time you have several alternative futures. In branching temporal logic you have the extra operators "A" (for "all futures") and "E" (for "some future"). For example, "A(work U go_home)" means "I will work until I go home" and "E(work U go_home)" means "I may work until I go home".
Modal Temporal Logic
Modal temporal logic. Research applications. We have developed an efficientexecutional model for an interval based linear modal temporal logic.
http://www.comp.brad.ac.uk/research/ai/temporal.html
Browsing Science Math Logic And Foundations Nonstandard Logics And Extensions Te
Centre for Agent Research and Development Among other activities, this group explorestopics related to temporal logic including temporal resolution methods.
http://www.uksprite.com/search/search/Science/Math/Logic_and_Foundations/Nonstan

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Verifying Temporal Formulas In The Temporal Logic Of Actions
Verifying temporal Formulas in the temporal logic of Actions. LucianWischik, University of Cambridge. The temporal logic of Actions.
http://gatekeeper.research.compaq.com/pub/DEC/SRC/technical-notes/SRC-1999-003-h
Temporal Logic
temporal logic. A Two useful temporal logics are Computation Tree logic(called CTL) and Linear temporal logic (called LTL). They
http://nusmv.irst.itc.it/NuSMV/papers/sttt_j/html/node3.html

Extractions: where is a finite set of states, is the set of initial states, and is the transition relation, specifying the possible transitions from state to state. is a function that labels states with the atomic propositions from a given language. Such a tuple is called state transition graph or Kripke structure Temporal logics are used to predicate over the behavior defined by Kripke structures. A behavior in a Kripke structure is obtained starting from a state , and then repeatedly appending states reachable through . We require that the transition relation be total. As a consequence all the behaviors of the system are infinite. Since a state can have more than one successor, the structure can be thought of as unwinding into an infinite tree, representing all the possible executions of the system starting from the initial states. Figure shows a state transition graph and its unwinding from the state labeled with `` A Two useful temporal logics are Computation Tree Logic (called CTL) and Linear Temporal Logic (called LTL). They differ in how they handle branching in the underlying computation tree. In CTL temporal operators it is possible to quantify over the paths departing from a given state. In LTL operators are intended to describe properties of all possible computation paths.
From Event-Based Semantics To Linear Temporal Logic
From EventBased Semantics to Linear temporal logic The logical and ComputationalAspects of a Natural Language Interface for Hardware Verification.
http://www.ltg.ed.ac.uk/prosper/papers/laureys-1999-ebs/

Extractions: P ROSPER AT E DINBURGH Abstract Computing system design can significantly benefit from the application of formal verification techniques. However, the logical expertise which formal verification requires has often hindered its take-up in industry. The present work proposes a solution to this problem in the form of a natural language interface for hardware verification. From a theoretical point of view, the logical background for an interface system is researched. On the computational side, a prototype is developed which can form the foundation for a fully operational natural language interface. Full paper PostScript PDF 26 November 1999
QSL: Temporal Logic
temporal logic. December 10, 2002. 11h00, Break, 11h20, temporal logic with ForgettablePast François Laroussinie, LSV, Ecole Normale Supérieure, Cachan
http://www.loria.fr/~merz/events/qsl021012/

Extractions: directions Organizers: and Stephan Merz The logic of time has its roots in philosophy and linguistics. Its application to specification and reasoning about computer-based systems is mainly due to Amir Pnueli's insight (published in his FOCS 1977 paper "The temporal logic of programs") that it provides relevant abstractions to describe runs of computer programs, and in particular of reactive systems . One of the practically most relevant discoveries has been the decidability of the model checking problem of standard propositional temporal logics over finite-state Kripke structures, leading to important advancements in the field of automatic verification and debugging of reactive systems, now routinely used in the herdware and telecommunication industries. This seminar is intended to review and discuss some recent developments as well as lessons learnt at the interface of theory and practice. Registration expired Welcome Automata and Games for Synthesis
The Temporal Logic Of Actions I
The temporal logic of Actions I. Wolfgang Provability; Rigid Variables and Quantifiers;The Enabled Predicate; Simple temporal logic; temporal Formulas;
http://www.risc.uni-linz.ac.at/courses/ss2001/formalpar/tla1/
Linear Temporal Logic
Linear temporal logic. This contribution 6166). Date July 2002. Keywords temporallogic, infinite transition systems, coinduction. Warning ! This
http://coq.inria.fr/contribs/LTL.html

Extractions: This contribution contains a shallow embedding of Linear Temporal Logic (LTL) based on a co-inductive representation of program executions. Temporal operators are implemented as inductive (respectively co-inductive) types when they are least (respectively greatest) fixpoints. Several general lemmas, that correspond to LTL rules, are proved. Download (archive compatible with Coq V7.4) Author: Solange COUPET-GRIMAL Institution: Laboratoire d'Informatique Fondamentale de Marseille (LIF, UMR 6166). Date: July 2002 Keywords: temporal logic, infinite transition systems, co-induction. Warning ! This contribution is based upon the following other contributions: relations The README file of the contribution: This page was automatically generated from this description file
AIDAM Special Issue: Temporal Logic In Engineering
CALL FOR PAPERS. Special Issue on temporal logic in Engineering. GuestEditors Brian Knight and Ephraim Nissan Deputy Guest Editor Jixin Ma.
http://www.gre.ac.uk/~E.Nissan/call.aiedam.temporal.logic.html

Extractions: ENGINEERING DESIGN, ANALYSIS AND MANUFACTURING. Temporal logic within AI is now a mature paradigm, with an extensive literature on theory, and a considerable panoply of published applications. Paper submissions are solicited for a special issue on applications of temporal logic to any branch of engineering. Papers should make a substantial contribution to the application domain, to provide insights other than rote on temporal logic itself, and to appeal to a scholarly readership of engineers or computer scientists. Refereeing will evaluate the quality of submissions in respect of both the application domain, and computer science. AIEDAM: Artificial Intelligence for Engineering Design, Analysis and Manufacturing is an archival research journal that is intended to reach two audiences: engineers and designers who see AI technologies as powerful means for solving difficult engineering problems; and researchers in AI and computer science who are interested in applications of AI and in the theoretical issues that arise from such applications. Original articles are specifically sought by AIEDAM, that develop new and interesting applications based on the most up-to-date research in all branches and phases of engineering, including analysis, synthesis and design; manufacturing and assembly; and concurrent engineering. The journal is interested in the use of AI in planning, design, analysis, simulation, spatial reasoning and graphics, manufacturing, assembly, process planning, scheduling, numerical analysis, and optimization. reas of special interest include: knowledge-based (expert) systems for engineering, including knowledge acquisition and representation, control, and system architectures; theo- retical work on the modeling of engineering problem-solving and design processes; the integration of AI-based techniques with numerical analysis tools, graphics and solid modeling packages, and engineering databases; and engineering applications of knowledge-based vision and of natural language processing.
Temporal Logic As A Programming Language
temporal logic as a Programming Language. The framework developed for propositionaltemporal logic is extended to firstorder temporal logic.
http://siskin.pst.informatik.uni-muenchen.de/~merz/papers/diss.html
Efficiently Executable Temporal Logic Programs
Efficiently executable temporal logic programs. Abstract We identifya subset of firstorder LTL (temporal logic of linear time) that
http://siskin.pst.informatik.uni-muenchen.de/~merz/papers/IJCAI93.html
Temporal Logic And Semidirect Products: An Effective Characterization Of The Unt
temporal logic and Semidirect Products An Effective Characterizationof the Until Hierarchy. Denis Thérien, Thomas Wilke. Abstract.
http://epubs.siam.org/sam-bin/dbq/article/32277

Extractions: pp. 777-798 Abstract. We reveal an intimate connection between semidirect products of finite semigroups and substitution of formulas in linear temporal logic. We use this connection to obtain an algebraic characterization of the until hierarchy of linear temporal logic. (The k th level of that hierarchy is comprised of all temporal properties that are expressible by a formula of nesting depth k in the until operator.) Applying deep results from finite semigroup theory we are able to prove that each level of the until hierarchy is decidable. By means of EhrenfeuchtFraissé games, we extend the results from linear temporal logic over finite sequences to linear temporal logic over infinite sequences. Key words. linear temporal logic, until hierarchy, substitution, finite semigroups, pseudovarieties of semigroups, aperiodic semigroups, semidirect products AMS Subject Classifications PII Retrieve PostScript document ( 32277.ps
UMCS-94-7-1 A Reified Temporal Logic For Nonlinear Planning
UMCS94-7-1 A Reified temporal logic for Nonlinear Planning (158605 bytes).Y. Zhang and H. Barringer. Keywords temporal logics in AI. AI planning.
http://www.cs.man.ac.uk/cstechrep/Abstracts/UMCS-94-7-1.html
Efficient Symbolic Tools
A BDD based tool for the formal verification of concurrent systems using a propositional branchingtime temporal logic action computation tree logic (ACTL). It runs under different OS, including Linux and Windows 95/98/NT.
http://www.el.feri.uni-mb.si/est/

Extractions: EST Home Page EST SourceForge Page is a mirror of this page at SourceForge Project: Efficient Symbolic Tools Authors: Robert Meolic, Tatjana Kapus, Ales Casar, Mirjam Sepesy Maucec, Zmago Brezocnik Synopsis: Efficient Symbolic Tools package (EST) is a new tool for the verification of concurrent systems , which has not been widely presented yet. Its main advantages are the flexibility, portability and an efficient memory management. The latter is mainly the consequence of a well implemented BDD package with good garbage collection functions. EST distinguishes itself as a small and efficient package with an easily readable source code and well implemented algorithms. It runs on many different computers with different operating systems, including HP-UX, Linux, and Windows 95/98/NT. COBISS-ID: 5626902 (this number is used by Slovenian libraries) Source Forge: EST SourceForge Project Info Previews: license menu dialog colors ... an example of verification est-1ed-linux.zip , Sep 21, 2001, (Intel, Debian 2.2.18, Tcl/Tk 8.2.3), est-1ed-solaris.zip
People In Temporal Logic
People in temporal logic. A list of Personal WWW pages of researchesin temporal logic. This is my personal collection of links to
http://www.doc.mmu.ac.uk/STAFF/A.Bolotov/LINKS/people.html
Temporal Logic
8. Intuitions about actions and events. 9. Interval temporal logic 10. Time infirst order predicate logic 11. Conclusion 16. References. temporal logic.
http://guthulamurali.freeservers.com/temp.html

Extractions: In temporal logic we will consider how it will effect the world which is developing very fast. Now a days it is very important to consider time as basic unit. Every plan depends on time. In this topic we will explain various temporal logic in which time plays important role we will also deal with various author theories in which they explain by taking time in to account. We consider various robot actions, planning, natural language understanding scheduling, and genetics. At last we will explain about reasoning of study room using temporal logic. Knowledge 'Knowledge is the symbolic representation of aspects of some named universe of discourse.' The universe of discourse may be the actual universe or some non-actual universe such as a universe in the future, a make -believe depicted in fiction, a universe existing in an individual's beliefs, etc.
Temporal Logic Resources
temporal logic Resources. Appeared in Volume 6/2, May 1993 Keywords temporal. Sometimeago, I asked can anyone point me to a very good text on temporal logic?
http://www-lp.doc.ic.ac.uk/UserPages/staff/ft/alp/net/exts/temporal.html

Extractions: 27th January 1993 Sometime ago, I asked: can anyone point me to a very good text on temporal logic? Does anyone know of a temporal logic interpreter? Something along the lines of Prolog, or an extension? This is a summary of the responses I received. From: cmenzel@kbssun1.tamu.edu (Chris Menzel) J. van Bentham, The Logic of Time, Reidel, 1983 A model-theoretic investigation into the varieties of temporal ontologies and their logics. kono@csl.sony.co.jp Robert Goldblatt, CSLI Lecture Notes, Logic of Time and Computation, CSLI, Vol. 7, 1987 There are many temporal logic interpreters: 1.Tokio, based on interval temporal logic, which I wrote. It is supported by both an interpreter and a compiler. It is close to Tempura, but supports non-deterministic execution. M. Fujita and S. Kono and H. Tanaka, Tokio: LP Language based on Temporal Logic and its compilation to Prolog, Proc. of Int. Conf. on LP, London, July 1986 2. Temporal Prolog.
499 Modal & Temporal Logic
499 Modal and temporal logic. 4th year/MAC course. Lecturers Michael Huthand Marek Sergot. Michael Huth gives the first half of the course.
http://www-lp.doc.ic.ac.uk/UserPages/staff/mjs/teaching/499.html
TCS - Studies - T-79.146 Logic In Computer Science: Special Topics I
Other Interesting Stuff. Formal methods Information and links Interesting bookson modal logic, temporal logic and verification of reactive systems.
http://www.tcs.hut.fi/Studies/T-79.146/

Extractions: Previous years: [ Spring 2002 Spring 2001 Spring 2000 Spring 1999 ... Spring 1998 This is an advanced course on logic and its applications in computer science and engineering. Subjects covered this year are: modal logics (syntax, semantics, proof theory and computational properties) and applications of temporal logic in concurrent and distributed systems. NEWS No lectures on Wed Feb 19 and no tutorial on Fri Feb 21 (because the lecturer is abroad). Lectures by Prof. Ilkka Niemelä : Wednesday 14-16, room TB353 Tutorials by M.Sc.(Tech.) Heikki Tauriainen : Fridays 9-10, room TB353 The course starts on Wed Jan 15 at 14.15 Course material

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