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math.AP2025
Keller-Osserman and Harnack type results for nonlinear elliptic PDE with unbounded ingredients
Boyan Sirakov, Aelson Sobral
We show that the classical Keller-Osserman theorem on the solvability of the equation is valid when is a general operator in divergence form w…
math.AP2025
Hopf-Oleinik lemma for elliptic equations in double divergence form
Hongjie Dong, Seick Kim, Boyan Sirakov
We establish, for the first time, a Zaremba-Hopf-Oleinik type boundary point lemma for uniformly elliptic partial differential equations in double divergence form, also known as st…