Some results on principal eigenvalues for periodic parabolic problems with weight
Uriel Kaufmann · Bulletin of the Australian Mathematical Society · 2003
Let Ω ⊂ ℝN be a bounded domain. We study existence and uniqueness of principal eigenvalues for the Dirichlet periodic parabolic problem with weight Lu = λmu in Ω × ℝ when the independent coefficient of the differential operator L is not necessarily positive.