Mathematics
J.-E. Pin's user avatar
J.-E. Pin's user avatar
J.-E. Pin's user avatar
J.-E. Pin
  • Member for 10 years, 4 months
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  • Paris
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25
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About

Research interests. Algebraic theory of automata and languages. In particular, connections with semigroup theory, combinatorics, logic and topology.

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Top posts
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All Questions Answers
Score Newest
answer
73
What's the point in being a "skeptical" learner
Feb 15, 2016
answer
47
Why is Lebesgue so often spelled "Lebesque"?
Sep 13, 2015
answer
40
I get a wrong determinant - why?
Feb 25, 2016
answer
31
Why does intersection always preserve "closed" structures?
Mar 31, 2020
answer
21
subset of binary space countable?
Feb 25, 2016
answer
17
Math Symbol for "Where"
May 29, 2015
answer
15
example of a set that is closed and bounded but not compact
Jul 24, 2019
answer
12
Why can ALL quadratic equations be solved by the quadratic formula?
Sep 30, 2013
answer
12
Is there such a thing as backwards sigma?
Mar 26, 2016
answer
12
How many rings are there for a given order?
Sep 14, 2020
Top Meta posts
4
3
38
Encouraging duplicate hunters
23
Wrong spelling of "occurrence"
15
Reference answers to frequently asked questions
9
Vandalizing question posted by others
8
Which tags have the largest proportion of closed questions?
Top network posts
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25
Complexity zoo for unary languages
21
How to create DFA from regular expression without using NFA?
18
Deciding whether a unary context-sensitive language is regular
16
Major unsolved problems in theoretical computer science?
16
Hierarchies in regular languages

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