solidot新版网站常见问题,请点击这里查看。
消息
本文已被查看1962次
Fine properties of branch point singularities: Dirichlet energy minimizing multi-valued functions. (arXiv:1711.06222v1 [math.AP])
来源于:arXiv
In the early 1980's Almgren developed a theory of Dirichlet energy minimizing
multi-valued functions, proving that the Hausdorff dimension of the singular
set (including branch points) of such a function is at most $(n-2),$ where $n$
is the dimension of its domain. Almgren used this result in an essential way to
show that the same upper bound holds for the dimension of the singular set of
an area minimizing $n$-dimensional rectifiable current of arbitrary
codimension. In either case, the dimension bound is sharp. We develop estimates
to study the asymptotic behaviour of a multi-valued Dirichlet energy minimizer
on approach to its singular set. Our estimates imply that a Dirichlet energy
minimizer at ${\mathcal H}^{n-2}$ a.e. point of its singular set has a unique
set of homogeneous multi-valued cylindrical tangent functions (blow-ups) to
which the minimizer, modulo a set of single-valued harmonic functions, decays
exponentially fast upon rescaling. A corollary is that the singular set 查看全文>>