Yi C. Huang

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20242026

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math.AP2026

On Brezis Open Problem 3.1

Qi Guo, Xueping Huang, Yi C. Huang +2

Let $B_{1}$ be the unit disk in $R^{2}$ . We consider the harmonic map equation $- I^ u = ∣\nabla u ∣^{2} u,$ subject to the Dirichlet boundary condition $ u(e^{iÎ¸})=(R\cosÎ¸,R\si…

math.AP2025

On the Moutard transformation singularity for the Davey--Stewartson II equation

Yi C. Huang

We indicate explicitly how to obtain the Moutard transformation singularity for the Davey--Stewartson II equation with two indeterminancy points. We also justify an arbitrary order…