This paper given the definition of the relative double multiplier on a ternary algebra, and study the isomorphic problem of the relative multiplier algebra.

Then, with congruence of the semialgebra, we proved the homomorphic theorem of semialgebra and its first and second isomorphic theorems.

This paper provides several linear isomorphism theorems for certain nonsymmetric differential operators of sixth order under proper topologies about some complex parameters.