自同构

Toral automorphisms mapping is a transform technology widely applied in digital image scramble. 花托自同构映射是一种变换技术, 尤其多被用于数字图像置乱。

Based on a non-solvable matrix Lie algebra L, the derivations and automorphisms of L were studied by the multiplication operation of block matrix. 摘要以一类非可解矩阵李代数L为研究对象，利用分块矩阵的乘法运算，对L的导子及自同构进行了研究。

On certain condition the result can be reverted by controlling the transformation time because of the periodicity of the toral automorphisms transformation. 由于花托自同构映射变换在一定条件下具有周期性, 使得通过控制变换的次数可以实现还原。

Application to characterizing the Jordan ring automorphisms on the space of self-adjoint operators and the space symmetric operators are also presented. 作为应用，获得自伴算子空间和对称算子空间上的约当环同构的具体刻画。

It gives the necessary and sufficient conditions for extension-isomorph to stem coverslifting all automorphisms of a group, and a constructive method for such stem covers. 英文摘要： we develop a struCture theory related to the stem covers lifting group automorphisms