# sigma derivation

If $\sigma$ is a ring endomorphism on a ring $R$, then a (left) $\sigma$-derivation is an additive map $\delta$ on $R$ such that $\delta(x\cdot y)=\sigma(x)\cdot\delta(y)+\delta(x)\cdot y$ for all $x,y$ in $R$.

Title sigma derivation SigmaDerivation 2013-03-22 11:42:50 2013-03-22 11:42:50 antizeus (11) antizeus (11) 22 antizeus (11) Definition msc 16S36 msc 81S40 msc 81Txx msc 18E05 msc 55N40 msc 18-00