Lp contractive projections and the heat semigroup for differential forms

Lp contractive projections and the heat semigroup for differential forms
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Lp 收缩投影和微分形式的热半群

DOI:
10.1016/0022-1236(86)90024-8
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发表时间:
1986
影响因子:
1.7
通讯作者:
R. Strichartz
R. Strichartz
中科院分区:
数学1区
文献类型:
--
作者:
R. Strichartz

文献摘要

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一个投影算子如果在Lp上对两个不同的p值都是压缩的,则它对所有的p值都是压缩的,并且其值域必须是一种特殊的形式。这个结果被用来证明在维数k上具有非平凡上同调的流形上的热半群叉形在任何Lp(p ∈ 2)上都不是压缩的.
A projection operator that is contractive onLpfor two distinct values ofpis shown to be contractive for all values ofp, and the range must be of a special form. This result is used to show that the heat semigroup fork-forms on many manifolds with nontrivial cohomology in dimensionkcannot be contractive on anyLpforp≠ 2.