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José María Grau Ribas's user avatar
José María Grau Ribas's user avatar
José María Grau Ribas's user avatar
José María Grau Ribas
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question
11
What is the limit of $a (n + 1) / a (n)$?
Apr 1, 2021
question
6
Do you know which is the minimal local ring that is not isomorphic to its opposite?
Nov 14, 2020
question
4
Do you know rings without involutions, auto-anti-isomorphics? In that case, what is the minimal example?
Mar 7, 2021
question
3
Number of rings with additive group $(\mathbb{Z}_{16})^2$. A341547(16) in OEIS
Apr 5, 2021
question
3
A generating function related to the Delannoy numbers
Jul 23, 2021
question
3
About the sequence $s_n:=f_{n,n} $ where $f_{0,n}=f_{n,0}= n^n$ and $f_{m,n} = f_{m-1,n}+ f_{m,n-1} + f_{m-1,n-1}$
Jul 28, 2021
question
2
Existence and uniqueness of solution of a nonlinear system
Jun 30, 2021
question
1
How many non-isomorphic associative algebras of dimension 2 over the field F_{p^k} are there?
Feb 10, 2021
question
1
Do you know a finite unitary reversible ring that is not isomorphic to its opposite? And the minimal with that property?
Mar 9, 2021
question
1
Why $\lim_{n\rightarrow \infty}\frac{F(n,n)}{F(n-1,n)} =\lim_{n\rightarrow \infty}\frac{F(n+1,n)}{F(n,n)} $?
Apr 10, 2021