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Uniqueness of translation invariant norms

机译:翻译不变性规范的唯一性

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Let A be a Banach function space and let M be a family of multipliers on A. We provide conditions on M so that the original topology of A is the only complete norm topology on A making all of the maps from M continuous. As a corollary we show that for a compact abelian group G, and a circle group T for A = L-P(T)(-), 1 < p < infinity, the L-P-norm is the only one that makes all trans rations continuous, while for A = C(G), A = L-infinity(G), or A = L-1(G) there are other norms with that property. For noncompact groups the situation is different-on the space L-1(R) the L-1-norm is the only one that makes a single nontrivial translation continuous. (C) 2000 Academic Press. [References: 14]
机译:令A为Banach函数空间,令M为A的乘子族。我们提供M的条件,以使A的原始拓扑成为A上唯一的完整范式拓扑,从而使M的所有映射都连续。作为推论,我们表明,对于紧致的阿贝尔群G和A = LP(T)(-)的圆群T,1 <无穷大,LP范数是使所有平移连续的唯一条件,对于A = C(G),A = L-无穷大(G)或A = L-1(G),还有其他具有该性质的范数。对于非紧凑型群体,情况是不同的-在L-1(R)空间上,L-1-范数是唯一使单个平凡翻译连续的空间。 (C)2000学术出版社。 [参考:14]

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