@article{oai:soar-ir.repo.nii.ac.jp:00018256,
 author = {Hiroshima,  Fumio and Sasaki,  Itaru},
 issue = {2},
 journal = {KYUSHU JOURNAL OF MATHEMATICS},
 month = {Sep},
 note = {The multiplicity of the lowest eigenvalue E of the so-called non-commutative harmonic oscillator Q(alpha, beta) is studied. It is shown that E is simple for alpha and beta in some region., Article, KYUSHU JOURNAL OF MATHEMATICS. 67(2):355-366 (2013)},
 pages = {355--366},
 title = {MULTIPLICITY OF THE LOWEST EIGENVALUE OF NON-COMMUTATIVE HARMONIC OSCILLATORS},
 volume = {67},
 year = {2013}
}