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20242026
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math.AP2026

Geometric approaches for improved regularity in fully nonlinear parabolic models

Junior da Silva Bessa, João Vitor da Silva, Mayra Soares

In this paper, we derive improved estimates for a class of fully nonlinear parabolic equations with continuous drift and admissible source terms of the form $$ \partial_{t}u - F(D^…

math.AP2026

Regularity for fully nonlinear degenerate parabolic equations with strong absorption

João Vitor da Silva, João Vitor da Silva, Feida Jiang +1

In this paper, we investigate dead-core problems for fully nonlinear degenerate parabolic equations with strong absorption, \begin{equation*} |Du|^{p} F(D^{2}u) - u_{t} = λ_{0}(x,t…

math.AP2026

Lipschitz regularity of weakly coupled vectorial almost-minimizers for Alt-Caffarelli functionals in Orlicz spaces

Pedro Fellype Pontes, João Vitor da Silva, Minbo Yang

For a fixed constant and a bounded Lipschitz domain with , we establish that almost-minimizers (functions satisfying a sort of variationa…

math.AP2026

Boundary regularity of weakly coupled vectorial almost-minimizers for Alt-Caffarelli functionals with non-standard growth

Pedro Fellype Pontes, João Vitor da Silva, Minbo Yang

For a fixed constant and a bounded Lipschitz domain with , we establish that almost-minimizers (functions satisfying a sort of variationa…

math.AP2025

Comparison Principle, A.B.P.-type estimates for solutions of quasi-linear elliptic equations in non-divergence form and some implications

Junior da S. Bessa, Reshmi Biswas, João Vitor da Silva +2

In this work, we establish global gradient estimates to solutions of quasilinear elliptic models in non-divergence form with general degeneracy law and a Hamiltonian term, given by…

math.AP2025

Regularity estimates for quasilinear elliptic PDEs in non-divergence form with Hamiltonian terms and applications

Junior da Silva Bessa, João Vitor da Silva

In this manuscript, we investigate regularity estimates for a class of quasilinear elliptic equations in the non-divergence form that may exhibit degenerate behavior at critical po…