实旗流形上的最速下降
Steepest descent on real flag manifolds
摘要:
实旗流形是非紧对称空间$G/K$的各向同性轨道。任何这样的流形$M$都具有两个非常特殊的几何性质:它带有(非紧)李群$G$的传递作用,并且它作为拉紧子流形嵌入欧几里得空间。本文的目的是连接这两个属性显示,梯度流的任何高度函数是一个单参数子群的$G$,其中梯度是相对于一个合适的齐次度量$s$定义的$M$ ;这推广了Kaehler度量的伴随轨道(所谓的复杂的旗流形)。
英文摘要:
Real flag manifolds are the isotropy orbits of noncompact symmetric spaces $G/K$. Any such manifold $M$ enjoys two very peculiar geometric properties: It carries a transitive action of the (noncompact) Lie group $G$, and it is embedded in euclidean space as a taut submanifold. The aim of the paper is to link these two properties by showing that the gradient flow of any height function is a one-parameter subgroup of $G$, where the gradient is defined with respect to a suitable homogeneous metric $s$ on $M$; this generalizes the Kaehler metric on adjoint orbits (the so-called complex flag manifolds).
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。