2 papers
math.AP2026
Local well-posedness and blow-up for the restricted fourth-order Prandtl equation
Ik Hyun Choi
We prove local well-posedness and finite-time blow-up for a restricted fourth-order Prandtl equation posed on the half-line with clamped boundary conditions. The equation arises fr…
math.OA2025
A solution to Haagerup's problem and positive Hahn-Banach separation theorems in operator algebras
Ikhan Choi
We affirmatively resolve a question posed by Uffe Haagerup in 1975 on the positive version of the bipolar theorem on the dual spaces of C-algebras. As a direct consequence, we…