485 citations · 2.2k across the 55 of their papers we have counts for
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Minimal length in an orbit closure as a semiclassical limit
Cole Franks, Michael Walter
Consider the action of a connected complex reductive group on a finite-dimensional vector space. A fundamental result in invariant theory states that the orbit closure of a vector…
Horn conditions for quiver subrepresentations and the moment map
Velleda Baldoni, Michèle Vergne, Michael Walter
We give inductive conditions that characterize the Schubert positions of subrepresentations of a general quiver representation. Our results generalize Belkale's criterion for the i…
The Horn inequalities from a geometric point of view
Nicole Berline, Michèle Vergne, Michael Walter
We give an exposition of the Horn inequalities and their triple role characterizing tensor product invariants, eigenvalues of sums of Hermitian matrices, and intersections of Schub…