This paper provides several linear isomorphism theorems for certain nonsymmetric differential operators of sixth order under proper topologies about some complex parameters.
给出了某类六阶非对称微分算子在一些合适拓扑下关于复参数的几个线性同构定理。
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The author attempts to illustrate that the order-disorder of crystal structure, and the isomorphism may be explained by the conception of colour symmetry.