Purely imaginary eigenvalues of operator semigroups.
Ruess, W.M.
Semigroup forum, Tome 51 (1995), p. 335-342 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1995-01-01
EUDML-ID : urn:eudml:doc:135420 
@article{GDZPPN00126446X,
     title = {Purely imaginary eigenvalues of operator semigroups.},
     journal = {Semigroup forum},
     volume = {51},
     year = {1995},
     pages = {335-342},
     zbl = {0831.47031},
     url = {http://dml.mathdoc.fr/item/GDZPPN00126446X}
}

Ruess, W.M. Purely imaginary eigenvalues of operator semigroups.. Semigroup forum, Tome 51 (1995) pp. 335-342. http://gdmltest.u-ga.fr/item/GDZPPN00126446X/