Login
Register
@
Dark Mode
Profile
Edit my Profile
Messages
My favorites
Register
Activity
Q&A
Questions
Unanswered
Tags
Subjects
Users
Ask
Previous Years
Blogs
New Blog
Exams
Dark Mode
Decidability
Mizuki
asked
in
Theory of Computation
Nov 14, 2018
467
views
0
votes
0
votes
How to distinguish between a problem which is (undecidable) and which is (undecidable but partially decidable); or rather for a given problem how to say in which category it falls?
decidability
theory-of-computation
turing-machine
recursive-and-recursively-enumerable-languages
Mizuki
asked
in
Theory of Computation
Nov 14, 2018
by
Mizuki
467
views
answer
comment
Follow
share this
share
2 Comments
by
goxul
commented
Nov 14, 2018
reply
Follow
share this
You should study Chapters 4 and 5 in Sipser's book on Theory of Computation. It's very well explained.
0
0
by
Mizuki
commented
Nov 14, 2018
reply
Follow
share this
@goxul Thanks!
0
0
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
0
votes
0
votes
I have seen your question I am not very sure of the answer,undecidable is sub classified as partially undecidable or semi-decidable,I don't want to confuse you with a wrong answer,Undecidable is when the Turing Machine does not halt so,semi and partial are Halting Turing Machines just for one particular case but not for the entire Grammar.Not very sure but here is what I think.Decidable is when you can make Turing Machine halt for the entire set of Languages generated by the grammar.
sripo
answered
Nov 14, 2018
by
sripo
comment
Follow
share this
1 comment
by
Mizuki
commented
Nov 14, 2018
reply
Follow
share this
Thanks!
0
0
Please
log in
or
register
to add a comment.
← Previous
Next →
← Previous in category
Next in category →
Related questions
1
vote
1
vote
0
answers
1
amitarp818
asked
in
Theory of Computation
Dec 28, 2023
240
views
Decidability
L(M)={0} We can have Tyes for {0} and Tno for Σ∗ ({0}⊂Σ∗{0}⊂Σ∗). Hence, L={M ∣ L(M)={0}} is not Turing recognizable (not recursively enumerable) I don’t understand why this is not decidable. We can easily create a turing that accepts this language
amitarp818
asked
in
Theory of Computation
Dec 28, 2023
by
amitarp818
240
views
decidability
theory-of-computation
turing-machine
recursive-and-recursively-enumerable-languages
0
votes
0
votes
1
answer
2
ajaysoni1924
asked
in
Theory of Computation
Jul 15, 2019
845
views
Self Doubt: Decidability
$L=\left \{\langle M_{1},M_{2}\rangle \text{ such that L}(M_{1})\prec L(M_{2}) \right \}$ is it recursive enumerable? here $L\left ( M_{1} \right )\prec L\left ( M_{2} \right )$ signifies language $L\left ( M_{1} \right )$ is reducible to $L\left ( M_{2} \right )$
ajaysoni1924
asked
in
Theory of Computation
Jul 15, 2019
by
ajaysoni1924
845
views
theory-of-computation
turing-machine
decidability
recursive-and-recursively-enumerable-languages
0
votes
0
votes
0
answers
3
Rahul_Rathod_
asked
in
Theory of Computation
Dec 24, 2018
963
views
decidability
please someone explain what are these problems and how to solve these problems for every language with proper explanation? MEMBERSHIP PROBLEM EMPTINESS PROBLEM COMPLETENESS PROBLEM EQUILITY PROBLEM SUBSET PROBLEM DISJOINTNESS PROBLEM IS GIVEN LANGUAGE REGULAR FINITENESS PROBLEM
Rahul_Rathod_
asked
in
Theory of Computation
Dec 24, 2018
by
Rahul_Rathod_
963
views
decidability
theory-of-computation
turing-machine
recursive-and-recursively-enumerable-languages
0
votes
0
votes
0
answers
4
Mk Utkarsh
asked
in
Theory of Computation
Nov 23, 2018
417
views
Decidability Doubt
$L_1 = \{ \text{<M>} | \ \text{M is a TM, } \text{M}_0 \ \text{is a TM that halts on all inputs and, } \text{M}_0 \in L(M) \}$ ... because $\exists$ infinite number of TM's which accept $\Sigma^*$. Now $L(M)$ is not even RE. If that then how $L_1$ is RE. Please explain both.
Mk Utkarsh
asked
in
Theory of Computation
Nov 23, 2018
by
Mk Utkarsh
417
views
theory-of-computation
decidability
recursive-and-recursively-enumerable-languages
turing-machine
Subscribe to GATE CSE 2024 Test Series
Subscribe to GO Classes for GATE CSE 2024
Quick search syntax
tags
tag:apple
author
user:martin
title
title:apple
content
content:apple
exclude
-tag:apple
force match
+apple
views
views:100
score
score:10
answers
answers:2
is accepted
isaccepted:true
is closed
isclosed:true
Recent Posts
Post GATE 2024 Guidance [Counseling tips and resources]
GATE CSE 2024 Result Responses
[Project Contest] Pytorch backend support for MLCommons Cpp Inference implementation
Participating in MLCommons Inference v4.0 submission (deadline is February 23 12pm IST)
IIITH PGEE 2024 Test Series by GO Classes
Subjects
All categories
General Aptitude
(3.5k)
Engineering Mathematics
(10.4k)
Digital Logic
(3.6k)
Programming and DS
(6.2k)
Algorithms
(4.8k)
Theory of Computation
(6.9k)
Compiler Design
(2.5k)
Operating System
(5.2k)
Databases
(4.8k)
CO and Architecture
(4.0k)
Computer Networks
(4.9k)
Artificial Intelligence
(79)
Machine Learning
(48)
Data Mining and Warehousing
(25)
Non GATE
(1.4k)
Others
(2.7k)
Admissions
(684)
Exam Queries
(1.6k)
Tier 1 Placement Questions
(17)
Job Queries
(80)
Projects
(11)
Unknown Category
(870)
64.3k
questions
77.9k
answers
244k
comments
80.0k
users
Recent Blog Comments
category ?
Hi @Arjun sir, I have obtained a score of 591 in ...
download here
Can you please tell about IIT-H mtech CSE self...
Please add your admission queries here:...
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy