Tchuenche, J. M. Variational formulation of a population dynamics problem. (English) Zbl 1108.92034 Int. J. Appl. Math. Stat. 3, No. D05, 57-63 (2005). Summary: We consider the existence and uniqueness of a weak solution of a population dynamics problem with an additional structure. This is proved by means of the contraction mapping principle under the assumption that the linear operator \(A\) is accretive. Cited in 1 Document MSC: 92D25 Population dynamics (general) 35A15 Variational methods applied to PDEs 46N60 Applications of functional analysis in biology and other sciences Keywords:age structure; obstacle problem; Ostrogradskii formula; operator PDFBibTeX XMLCite \textit{J. M. Tchuenche}, Int. J. Appl. Math. Stat. 3, No. D05, 57--63 (2005; Zbl 1108.92034)