37 citations · 193 across the 39 of their papers we have counts for
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math-ph2011★ 3 cited
On eigenvalues of the Schrödinger operator with an even complex-valued polynomial potential
Per Alexandersson
In this paper, we generalize several results of the article "Analytic continuation of eigenvalues of a quartic oscillator" of A. Eremenko and A. Gabrielov. We consider a family of…
math.AG2011★ 4 cited
Discriminants, symmetrized graph monomials, and sums of squares
Per Alexandersson, Boris Shapiro
Motivated by the necessities of the invariant theory of binary forms J. J. Sylvester constructed in 1878 for each graph with possible multiple edges but without loops its symmetriz…