27 citations · 47 across the 4 of their papers we have counts for
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math.AP2012★ 16 cited
A Hamiltonian-Krein (instability) index theory for KdV-like eigenvalue problems
Todd Kapitula, Atanas Stefanov
The Hamiltonian-Krein (instability) index is concerned with determining the number of eigenvalues with positive real part for the Hamiltonian eigenvalue problem , where…
math.AP2012★ 3 cited
An Instability Index Theory for Quadratic Pencils and Applications
Jared Bronski, Mathew A. Johnson, Todd Kapitula
Primarily motivated by the stability analysis of nonlinear waves in second-order in time Hamiltonian systems, in this paper we develop an instability index theory for quadratic ope…