10 papers
Shared environmental risk selects asymmetric inheritance of a protective reserve
Quentin Thommen
Environmental sharing changes the value of diversification even when the marginal statistics experienced by each lineage remain unchanged. A minimal model of cell division couples…
Jordan rigidity of full matrix algebras
Ilja GogiÄ, Matija Kazalicki, Mateo TomaÅ¡eviÄ
Let be a field of characteristic different from , and let denote the Jordan algebra of all matrices over with product $…
Quartic Rational Diophantine Quadruples and the Euler Surface
Alen Andrašek, Matija Kazalicki, Domagoj Vlah
We prove that there exist infinitely many quartic rational Diophantine quadruples, that is, sets of four pairwise distinct nonzero rational numbers whose pairwise products increase…
The Jordan multiplication semigroup of matrix algebras is the full endomorphism semigroup
Ilja GogiÄ, Matija Kazalicki, Mateo TomaÅ¡eviÄ
Let be a field of characteristic different from , and let be the algebra of all matrices over . We consider the correspond…
Seven squares from three numbers
Andrej Dujella, Matija Kazalicki, Vinko PetriÄeviÄ
We study triples {a,b,c} of distinct nonzero rational numbers such that a+1,b+1,c+1,ab+1,ac+1,bc+1 and abc+1 are all perfect squares. We prove that there exist infinitely many such…
Equidistribution of Diophantine pairs among the equivalence classes of quadratic forms
Goran DražiÄ, Matija Kazalicki, Rudi MrazoviÄ
For a fixed integer n, a pair of nonzero integers {a, c} is called a D(n)-pair if the product ac plus n is a perfect square. In this short note we prove that D(n)-pairs are asympto…