PPT-Decidability /

Undecidability To discuss decidability undecidability we need Turingmachines and to discuss Turingmachines we need formal languages and strings and alphabets And a bit more. This algorithm may call any other algorithms from the textbook lectures class handouts or homework assignments but you should cite the appropriate reference How do you decide which existing algorithms it should call if any This is a familiar problem dauphinefr GISED University of Zaragoza Spain Email lrecalde silva unizares Abstract State explosion is a fundamental problem in the analysis and synthesis of discrete event systems Continuous Petri n ets can be seen as a relaxation of discrete model darondeauinriafr LSV ENS Cachan CNRS INRIA France StephaneDemrilsvenscachanfr University of Kaiserslautern Germany meyercsuniklde Universit57577 ParisEst MarneLaVall57577e France christophemorvanunivparisestfr Abstract We investigate the decidability More precisely we can explain what it means for a partial arith metic function to be computable Since we can code any 64257nite discrete object as a natural number in a natural way we also have a notion of computability on these obj ects We can use In the case of deterministic 64257nite au tomata problems like equivalence can be solved even in polynomial time Also there are e64259cient parsing algorithms for context free grammars If necessary we may brie64258y review some material on regular a sci ossapco and nebelinformatikunifreibr gde Uni ersit at Freib ur g Institut ur Informatik Geor gesK ohler Allee Geb 52 D79110 Freib ur g German Abstract The Double Cr oss calculus has been proposed for the purpose of na v igation based on qualitati y Reading: Chapter 8 & 9 1 Decidability vs. Undecidability There are two types of TMs (based on halting): TMsthat halt nomatteracceptingornon - DECIDABLE TMsthat areguaranteedtohalt onlyonacceptance I 5. and decidability D. Keil Discrete Structures 2/14 David M. Keil , Framingham State University CSCI 317 Discrete Structures for Computer Science 5. Countability and decidability 1. Count 2 M. 0. RABIN [July the first-order theory of the lattice of all closed subsets of the real line is decidable. Through Stone's representation theorm, the results concerning Cantor's dis- continuum lea Fall 2017. http://cseweb.ucsd.edu/. classes/fa17/cse105-a/. Today's learning goals . Sipser Ch 4.1. Explain what it means for a problem to be decidable.. Justify the use of encoding.. Give examples of decidable problems.. Fall 2017. http://cseweb.ucsd.edu/. classes/fa17/cse105-a/. Today's learning goals . Sipser Ch 4.1. Explain what it means for a problem to be decidable.. Justify the use of encoding.. Give examples of decidable problems..