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arXiv 1502.03740math.DGmath.APmath.DS
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线性发展方程的一致稳定性及其在并行输运中的应用

Uniform stability of linear evolution equations, with applications to parallel transports

Tim Kirschner

摘要:

本文证明了Banach空间$E$中线性发展方程$x' = A(t)x$的双稳定性,其中算子值函数$A$的形式为$A(t) = f'(t)G(t,f(t))$,对应于二元算子值函数$G$和标量函数$f$ .约束方程解的常数是显式计算的;在某种意义上,它与$f$无关。给出了稳定性结果的两个几何应用。首先,我表明,平行运输沿曲线$γ$在一个流形上,相对于一些线性连接,是有界的长度的投影$γ$的流形低一个维度。其次,证明了向量丛中平行截面的一个可拓性结果,从而回答了Antonio J. Di Scala的一个问题。

英文摘要:

I prove the bistability of linear evolution equations $x' = A(t)x$ in a Banach space $E$, where the operator-valued function $A$ is of the form $A(t) = f'(t)G(t,f(t))$ for a binary operator-valued function $G$ and a scalar function $f$. The constant that bounds the solutions of the equation is computed explicitly; it is independent of $f$, in a sense. Two geometric applications of the stability result are presented. Firstly, I show that the parallel transport along a curve $γ$ in a manifold, with respect to some linear connection, is bounded in terms of the length of the projection of $γ$ to a manifold of one dimension lower. Secondly, I prove an extendability result for parallel sections in vector bundles, thereby answering a question by Antonio J. Di Scala.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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