The kernel bundle of a holomorphic Fredholm family

Abstract

Let $\Y$ be a smooth connected manifold, $Σ\subset\C$ an open set and $(σ,y)\to\scrP_y(σ)$ a family of unbounded Fredholm operators $D\subset H_1\to H_2$ of index 0 depending smoothly on $(y,σ)\in \Y\times Σ$ and holomorphically on $\sigma$. We show how to associate to $\scrP$, under mild hypotheses, a smooth vector bundle $\kerb\to\Y$ whose fiber over a given $y\in \Y$ consists of classes, modulo holomorphic elements, of meromorphic elements $\varphi$ with $\scrP_yϕ$ holomorphic. As applications we give two examples relevant in the general theory of boundary value problems for elliptic wedge operators.

16 pages

Cited by in corpus (1)

• Boundary value problems for first order elliptic wedge operators