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The geometry of Kato Grassmannians
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Abstract
We discuss Fredholm pairs of subspaces and associated Grassmannians in a Hilbert space. Relations between several existing definitions of Fredholm pairs are established as well as some basic geometric properties of the Kato Grassmannian. It is also shown that the so-called restricted Grassmannian can be endowed with a natural Fredholm structure making it into a Fredholm Hilbert manifold.
Title: The geometry of Kato Grassmannians
Description:
Abstract
We discuss Fredholm pairs of subspaces and associated Grassmannians in a Hilbert space.
Relations between several existing definitions of Fredholm pairs are established as well as some basic geometric properties of the Kato Grassmannian.
It is also shown that the so-called restricted Grassmannian can be endowed with a natural Fredholm structure making it into a Fredholm Hilbert manifold.
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