Positive solutions for sublinear periodi
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T. Godoy; U. Kaufmann; S. Paczka
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Article
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2003
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Elsevier Science
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English
β 153 KB
## Let be a bounded domain in R N . We characterize the set of positive principal eigenvalues for the Dirichlet periodic parabolic problem Lu = g(x; t; u) in Γ R, under the assumptions that g is a function such that β g(x; t; )= is continuously di erentiable and nonincreasing in [0; β) a.e. (x; t)