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Zeros of eigenfunctions of some anharmonic oscillators

open access: yes, 2008
We study complex zeros of eigenfunctions of second order linear differential operators with real even polynomial potentials. For potentials of degree 4, we prove that all zeros of all eigenfunctions belong to the union of the real and imaginary axes. For
Shapiro, Boris   +2 more
core  

Quantum Systems at The Brink: Helium-Type Systems. [PDF]

open access: yesArch Ration Mech Anal
Hundertmark D, Jex M, Lange M.
europepmc   +1 more source

Multilevel Multivariate Functional Principal Component Analysis of Evoked and Induced Event-Related Spectral Perturbations. [PDF]

open access: yesStat Biosci
Dong M   +12 more
europepmc   +1 more source

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