Ultraprimeness of the Lorentz algebraStrašek, Rok (Avtor) mathemaricsLorentz algebraWe solve the problem of finding the best possible constant of ultraprimeness for the special class of Euclidean algebra called Lorentz algebra. More precisely, we prove that for Lorentz algebra, equipped with spectral norm, thebest possible constant of ultraprimeness is 1/2 regardless of dimension.20052012-06-01 09:47:57Neznano27095sl