Jordan Isomorphisms of Finitary Incidence Algebras

Rosali Brusamarello, Érica Z. Fornaroli, Mykola Khrypchenko

Let $X$ be a partially ordered set, $R$ a commutative $2$-torsionfree unital ring and $FI(X,R)$ the finitary incidence algebra of $X$ over $R$. In this note we prove that each $R$-…