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Arnaud D.'s user avatar
Arnaud D.'s user avatar
Arnaud D.'s user avatar
Arnaud D.
  • Member for 10 years, 6 months
  • Last seen this week
  • Czech Republic
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About

I did my PhD in mathematics at UCLouvain in Louvain-la-Neuve, Belgium, and am now a postdoc the Institute of Mathematics of the Czech Academy of Science in Prague. I am interested in algebra, especially universal algebra and category theory.

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91
Is there an intuitive reason for a certain operation to be associative?
Feb 19, 2018
answer
30
Limit of sequence in which each term is defined by the average of preceding two terms
May 11, 2017
answer
17
How to find a 3x3 matrix with determinant =0 from which I can delete random column and random row to make it nonzero?
Jun 4, 2017
answer
15
Prove: $|a\sin x+b \cos x|\leq \sqrt{a^2+b^2}$
Jun 21, 2016
answer
14
Is the identity axiom in the definition of group action redundant?
Aug 10, 2018
answer
13
Does every functor from Set to Set preserve products?
Feb 27, 2019
answer
12
First Isomorphism Theorem for Monoids?
Dec 28, 2016
answer
12
Can functoriality be explained in the opposite way?
Mar 1, 2020
answer
12
Is there an Elementary Theory of the Category of Groups?
Jun 22, 2017
answer
12
Function with infinitely many right inverses?
Jan 17, 2016

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Tag management 2019
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Editing non-SE links with HTTPS?
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"Enlightened" Badge wrongly awarded
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Tag management 2019
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OLD Requests for Reopen & Undeletion Votes (volume 07/2018 - 12/2020)

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Has BLM raised over 1 billion dollars but not yet performed any neighborhood cleanup, school funding, food aid or housing services?
19
Should I cite a paper that I haven't read if I use a theorem in it?
15
What can I do if a flight delay makes me miss the transfer from the airport?
13
Is the category of racks semi-abelian?
10
Does the North know that Ramsay did not marry Arya?