invariant GMAT

In other words, The Hermiticity of a matrix is invariant under unitary transformations.

换言之，矩阵的厄密性在幺正变换下保持不变。

But diffeomorphism invariant theory leaves some problems to be explained, and the meanings of spacetime and physical theory are still in question.

但微分同胚不变论存在需要解释的问题，空论的意义仍不明确。

They came to think about algebraic objects associated with knots/links that are invariant under isotopy c .J.W.Alexander came up with the first good such quantity, the Alexander polynomiald .

我认为剩下的人里面绝大多数对于一个中国人只身在国外奋斗所遭遇的种种困难、辛酸、挫折、失落、压抑、他人的期望，成功和兴奋没有了解，更遑论解。