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
Undecidability Doubt
Sparsh-NJ
asked
in
Theory of Computation
Aug 6, 2023
edited
Aug 6, 2023
by
makhdoom ghaya
226
views
0
votes
0
votes
If G is a CFG then L(G) = (Sigma)* is Decidable or Undecidable?
The reference where I solved this question says this is an Undecidable problem! But I think it's Decidable .
Help would be appreciated.
theory-of-computation
decidability
Sparsh-NJ
asked
in
Theory of Computation
Aug 6, 2023
edited
Aug 6, 2023
by
makhdoom ghaya
by
Sparsh-NJ
226
views
answer
comment
Follow
share this
share
1 comment
by
Psy Duck
commented
Aug 6, 2023
reply
Follow
share this
undecidable
1
1
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
0
Answers
← Previous
Next →
← Previous in category
Next in category →
Related questions
9
votes
9
votes
0
answers
1
Balaji Jegan
asked
in
Theory of Computation
Jul 12, 2018
2,411
views
Decidability Vs Semi-Decidability Vs Undecidability Self Doubt
Please tell whether the following is Decidable, Semi-decidable or Undecidable A turing machine halts after running for exactly k steps A turing machine halts after running for atmost k steps A turing machine halts after running ... ;x" A turing machine visits a particular state "q" atleast k times on input "x"
Balaji Jegan
asked
in
Theory of Computation
Jul 12, 2018
by
Balaji Jegan
2.4k
views
decidability
theory-of-computation
turing-machine
0
votes
0
votes
0
answers
2
jatin khachane 1
asked
in
Theory of Computation
Jan 8, 2019
724
views
TOC(Undecidability)
L1 = { <M> | M halts on $\epsilon$ } L2 = { <M> | $\epsilon$ $\in$ L(M) } Which one is RE or not RE
jatin khachane 1
asked
in
Theory of Computation
Jan 8, 2019
by
jatin khachane 1
724
views
theory-of-computation
decidability
1
vote
1
vote
0
answers
3
srestha
asked
in
Theory of Computation
Dec 6, 2018
382
views
Undecidability with PCP
Where can we apply PCP to check, if the grammar is undecidable? Some examples of such grammars Ambiguous grammar Any other example and how they solved with PCP?
srestha
asked
in
Theory of Computation
Dec 6, 2018
by
srestha
382
views
theory-of-computation
decidability
2
votes
2
votes
0
answers
4
Ayush Upadhyaya
asked
in
Theory of Computation
Nov 23, 2018
962
views
TOC-Undecidability
Here is my analysis. P1: When we bound the number of steps a turing machine can tape, the total number of input possible that can be taken by such turing machine becomes finite and by running TM in an interleaved mode I can decide whether TM M halts on x within ... decide P3. Hence, P3 is decidable.->REC. So, I think here answer must be 1. Please let me know what's right.
Ayush Upadhyaya
asked
in
Theory of Computation
Nov 23, 2018
by
Ayush Upadhyaya
962
views
theory-of-computation
decidability
rice-theorem
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