Supported by NSFC under Grants 11771280 and 11671258;by NSF of Shanghai Municipal under Grant 17ZR1415400.
The new concept"derimorphism"generalizing both derivation and homomor-phism is defined.When a derimorphism is invertible,its inverse is a Rota-Baxter operator.The general theory of derimorphism is established.The clas...