Positive solutions to singular fractional differential system with coupled boundary conditions

Estimates near the boundary for solutions of elliptic partial differential equations satisfying general boundary conditions. I

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Positive Solutions of Operator Equations.

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Estimates near the boundary for solutions of elliptic partial differential equations satisfying general boundary conditions II

Shmuel Agmon, Avron Douglis, Louis Nirenberg · Communications on Pure and Applied Mathematics · 1964 · 1.3K citations

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Dynamics of HIV infection of CD4+ T cells

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POSITIVE SOLUTIONS OF OPERATOR EQUATIONS

F. F. Bonsall · Journal of the London Mathematical Society · 1966 · 771 citations

Natural Sciences, Mathematics, Differential Equations +6