Let (X, <=) be a locally finite preordered set andRa 2-torsion free commutative ring with unity,I(X, R) the incidence algebra ofXoverR. We prove that each nonlinear derivation ofI(X, R) is a sum of an inner derivation, a transitive induced derivation and an additive induced derivation. In particular, every nonlinear derivation ofI(X, R) is automatically additive.
机构:
Sichuan Int Studies Univ, Sch Int Business & Management, Chongqing, Peoples R ChinaSichuan Int Studies Univ, Sch Int Business & Management, Chongqing, Peoples R China
Yan, Shenghua
Yang, Yuping
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Southwest Univ, Sch Math & Stat, Chongqing 400715, Peoples R ChinaSichuan Int Studies Univ, Sch Int Business & Management, Chongqing, Peoples R China
机构:
Huaqiao Univ, Sch Math Sci, Quanzhou, Fujian, Peoples R China
Huaqiao Univ, Sch Math Sci, Quanzhou 362021, Fujian, Peoples R ChinaHuaqiao Univ, Sch Math Sci, Quanzhou, Fujian, Peoples R China