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Arnaud D.

Belgium

I am a PhD student in mathematics at Université catholique de Louvain in Louvain-la-Neuve, Belgium. I am interested in algebra, especially universal algebra and category theory.

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90
Is there an intuitive reason for a certain operation to be associative?
math.stackexchange.com

55
Has BLM raised over 1 billion dollars but not yet performed any neighborhood cleanup, school funding, food aid or housing services?
skeptics.stackexchange.com

31
Limit of sequence in which each term is defined by the average of preceding two terms
math.stackexchange.com

17
How to find a 3x3 matrix with determinant =0 from which I can delete random column and random row to make it nonzero?
math.stackexchange.com

14
Is the identity axiom in the definition of group action redundant?
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13
Does every functor from Set to Set preserve products?
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13
Prove: $|a\sin x+b \cos x|\leq \sqrt{a^2+b^2}$
math.stackexchange.com

13
Is the category of racks semi-abelian?
mathoverflow.net

12
Function with infinitely many right inverses?
math.stackexchange.com

12
If $\det(A^2)= \det(A)$, then $A^2 \in \{A, A^{-1}, -A, -A^{-1}\}$
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12
Can functoriality be explained in the opposite way?
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12
Is there an Elementary Theory of the Category of Groups?
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11
Why is a coproduct of representables never representable?
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11
When does equation $(A^TA)^n=I$ have solution?
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10
Does the North know that Ramsay did not marry Arya?
scifi.stackexchange.com

10
Alternative definition for tensor product which nowhere occurs (to my knowledge)
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10
Complex roots of polynomials, proving this particular property
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10
Find a splitting field for $x^4 - x^2 - 2$ over $\Bbb Z_3$
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10
Is power set functor determined by its image on objects?
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9
Monoid in the category of endofunctors and Monoid as a category with one object
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9
Isomorphism of hom sets implies objects are isomorphic
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9
Solve equation in determinant
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9
Let $C,D$ be categories and $F:C\to D$ and $G:D\to C$ be adjoint functors. Then $F$ is fully faithful iff the unit is an isomorphism?
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9
Is there any trivial ring which isn't null?
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9
Under what condition does $f(f^{-1}(f(A))) = f(A)$?
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9
Group theoretic meaning of natural isomorphisms between certain functors
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8
"Categorical" Schröder–Bernstein theorem?
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8
When were triples called monads for the first time?
mathoverflow.net

8
Why weren't there more assassination attempts?
scifi.stackexchange.com

8
First Isomorphism Theorem for Monoids?
math.stackexchange.com

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