设A是Jordan代数,如果映射d:A→A满足任给a,b∈A,都有d(aob)=d(a)o b+aod(b),则称d为可乘Jordan导子.如果A含有一个非平凡幂等p,且A对于p的Peirce分解A=A1⊕A1/2⊕A0满足:(1)设ai∈Ai(i=1,0),如果任给t1/2∈A1/2,都有ai○t1/2=0,则ai=0,则A上的可乘Jordan导子d.如果满足d(p)=0,则d是可加的.由此得到结合代数和三角代数满足一定条件时,其上的任意可乘Jordan导子是可加的.
Let A be a Jordan algebra.If the map d:A→A satisfies d(a o b) = d(a) o b + a o d(b) for all a,b∈A,then d is called a multiplicative Jordan derivation on A.Our main objective in this note is to prove the following.Suppose A has an idempotent p(p≠0,p≠1) which satisfies that the Peirce decomposition of A with respect to p,A = A_1 ? A_(1/2) ? A_0,satisfies that (1) Let a_i∈A_i(i =,0).If a_i o t_(1/2) =0 for all t_(1/2)∈A_(1/2),then a_i = 0. If d is any multiplicative Jordan derivation of A which satisfies that d(p) = 0,then d is additive.As its application,we get the result that every multiplicative Jordan derivation on some associative algebras and triangular algerbas is additive.