In this paper,we define mean index for non-periodic orbits in Hamiltonian systems and study its properties.In general,th......

Let X be an infinite-dimensional real or complex Banach space,and B(X) the Banach algebra of all bounded linear operator......

讨论一般半单Ｂａｎａｃｈ代数上乘子的谱特征和Ｆｒｅｄｈｏｌｍ理论，得到了乘子Ｔ是对于ＫＭ（Ａ）的Ｆｒｅｄｈｏｌｍ元素的一个表征，并对某些代数上的乘子证明了Ｆｒｅｄｈｏｌｍ元素和Ｆｒｅｄｈｏｌｍ算子的等价性。......