October 6

October 6 - CSCI 2670 Introduction to Theory of Computing...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CSCI 2670 Introduction to Theory of Computing October 6, 2005 October 6, 2005 2 Agenda Yesterday Variants of Turing machines Allow stay put state Multiple tapes Today Quick revisit of multiple tapes Non-determinism Prove equivalence of deterministic and nondeterministic Turing machines Enumerators Prove equivalence of enumerators and deterministic Turing machines October 6, 2005 3 Announcements Homework due next Tuesday 3.7, 3.15 b & c, 3.16 d 3.7 and 3.15 are same in both texts 3.16 d Show the collection of Turing-recognizable languages is closed under the operation of intersection. October 6, 2005 4 Corollary Corollary: A language is Turing-recognizable if and only if some multitape Turing machine recognizes it. October 6, 2005 5 Example Using 2-tape Turing machine, write a copy machine Copy tape 1 to tape 2 Move tape 1 to beginning Copy tape 1 to tape 2 Accept October 6, 2005 6 Copy machine {a,~} {x,a},{R,R} {b,~} {y,b},{R,R} {~,~} {L,L} q accept ~,~ {L,S} {x,~} {a,a},{R,R} {y,~} {b,b},{R,R} {~ ,~} {R,R} q reject {a,~} {a,a},{R,R} {b,~} {b,b},{R,R} {a,~} {L,S} {b,~} {L,S} {a,~} {a,a},{R,R} {b,~} {b,b},{R,R} October 6, 2005 7 Copy machine a x,R b y,R ~...
View Full Document

{[ snackBarMessage ]}

Page1 / 24

October 6 - CSCI 2670 Introduction to Theory of Computing...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online