A ratio operator limit theorem

A ratio operator limit theorem
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比率算子极限定理

DOI:
10.1007/bf00532502
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发表时间:
1963
期刊:
Zeitschrift für Wahrscheinlichkeitstheorie und Verwandte Gebiete
影响因子:
--
通讯作者:
J. Doob
J. Doob
中科院分区:
--
文献类型:
--
作者:
J. Doob

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设(X 0,/to)和(Xi,/ti)是测度空间。我们省略了对可测集合的类的引用,并且即使没有明确地做出假设,下面使用的所有集合都被假设为可测的。设T是从Li(X 0,/t0)到Li(Xi,# i)的线性变换,它是正的(即把正函数化为正函数),范数为~ 1。然后有一个从Loo(Xi,/ti)到L~(Xo,# 0)的伴随变换T*,也是正的,L~ norm~ 1。如果/t~不是a-有限的,则Loo(Xi,/t~)具有通常的lupremum范数,但根据定义,它的每个函数都从一个集合消失,这取决于函数,该函数是可数多个有限测度集的并集。伴随T* 由(1.1)f(T/0)gi d/ti=~/0 T* gi d/t0确定。
Let (X0,/to) and (Xi,/ti) be measure spaces. We omit reference to the classes of measurable sets, and all sets used below are assumed measurable even when the assumption is not made explicitly. Let T be a linear transformation from Li (X0,/t0) into Li (Xi,# i) which is positive (that is, takes positive functions into positive functions) and has norm~ 1. There is then an adjoint transformation T* from Loo (Xi,/ti) into L~(Xo,# 0), also positive, with L~ norm~ 1. If/t~ is not a-finite, Loo (Xi,/t~) has the usual lupremum norm but by definition each of its functions vanishes off a set, depending on the function, which is the union of countably many sets of finite measure. The adjoint T* is determined by (1.1) f (T/0) gi d/ti=~/0 T* gi d/t0.
DOI: 10.1002/9781118231296.ch8
发表时间: 2018-11
期刊: Gauge Integral Structures for Stochastic Calculus and Quantum Electrodynamics
影响因子: --
作者:
Dr. Gergely Záruba
通讯作者: Dr. Gergely Záruba