## Rocky Mountain Journal of Mathematics

### Jordan derivations of incidence algebras

Zhankui Xiao

#### Abstract

Let $\mathcal{R}$ be a commutative ring with identity and $I(X,\mathcal{R})$ the incidence algebra of a locally finite pre-ordered set $X$. In this note, we characterize the derivations of $I(X,\mathcal{R})$ and prove that every Jordan derivation of $I(X,\mathcal{R})$ is a derivation, provided that $\mathcal{R}$ is $2$-torsion free.

#### Article information

Source
Rocky Mountain J. Math., Volume 45, Number 4 (2015), 1357-1368.

Dates
First available in Project Euclid: 2 November 2015

https://projecteuclid.org/euclid.rmjm/1446472438

Digital Object Identifier
doi:10.1216/RMJ-2015-45-4-1357

Mathematical Reviews number (MathSciNet)
MR3418198

Zentralblatt MATH identifier
1328.16022

#### Citation

Xiao, Zhankui. Jordan derivations of incidence algebras. Rocky Mountain J. Math. 45 (2015), no. 4, 1357--1368. doi:10.1216/RMJ-2015-45-4-1357. https://projecteuclid.org/euclid.rmjm/1446472438