节点文献
一类函数空间的某些性质
Some Properties of a class of function spaces
【摘要】 本文进一步讨论了引进的拓扑空间U_Φ的某些性质:建立了Φ—Vitali 收敛定理;给出U_Φ为Banach 空间的一个充要条件;给出U_Φ为Φ一完备的一个充要条件,并且给出U_Φ中列紧性判别法。
【Abstract】 The paper is devoted some properties of function space Uφ,which is introduced by Ul’janov,P.L.Theoreml.Let φ∈(?) and φ satisfies △2—condition,φ(+0)=0 and φ(t)>0for all t>0,if {fn}n∞=1 (?)φ(L),then(1)f∈φ(L)(2)fn(?)(n→∝)if and only if(i) fn(?)f (n→∝)(ii) {φ[fn(t)]}n=1∞,has equi—integral absolute continuity.Theorem 3.Suppose that φ∈(?),φ(+0)=0,φ(t)>0 for all t>0 and φ(2t)≤hφ(t)for all t∈(0,t0),Where h and t0 are constants,then topology space Uφ iscomplete if and only if φ satisfies △2—condition.Theorem 10.Let φ∈(?) and φ(+0)=0,the φ(L) is the Banach space and theconvergence in norm is equivalent to the convergence in φ—distance in the spaceUφ if and only if φ has the subconvex property and is satisfied by A2—condition.
- 【文献出处】 哈尔滨工业大学学报 ,Journal of Harbin Institute of Technology , 编辑部邮箱 ,1981年01期
- 【被引频次】2
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