Suppose that f:Hn → Hn (n≥2) maps any r-dimensional hyperplane (1≤r【n) into an r-dimensional hyperplane. In this pap......

通过对Toeplitz算子符号的考察,作者得到了满射Toeplitz算子的一些充分和必要的条件,并对某些特殊情形作了详细的刻划,推广了Micha......

本文通过一道近世代数习题的剖析,提出了如何引导学生进行探索性思维的问题。...

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Sufficient conditions are given to assert that two differentiable mappings between Banach spaces have common values. The......

推导和证明由ＧｏｎｚａｌｅｚＭ和ＭａｒｔｉｎｏｎＡ．新近建立的（Ａ，Ｂ）型算子理想的某些本性质，对（Ｌ，Ｂ）是否与Ｂ的闭满射包重合问题进行了讨论，提出并且分析了一些有趣的问题。......

In this paper we characterize a broad class of semilinear surjective operators given by the following formula where Z ar......