Hajime Koba. Global solvability for the heat equations in two half spaces and an interface. Journal of Mathematical Analysis and Applications. 2025
Hajime Koba. Energetic variational approaches for inviscid multiphase flow systems with surface flow and tension. Quarterly of Applied Mathematics. 2024. 83. 1. 159-188
Hajime Koba, Kazuki Sato. Error analysis of approximate operators for a particle method based on Voronoi diagram. Analysis. 2023
Hajime Koba. ON GENERALIZED COMPRESSIBLE FLUID SYSTEMS ON AN EVOLVING SURFACE WITH A BOUNDARY. QUARTERLY OF APPLIED MATHEMATICS. 2023