2 papers
math.DG2026
Geometry on principal curvature surfaces
Luciana F. Martins, Kentaro Saji, Samuel P. dos Santos +1
We study the geometry of the principal curvature surface associated with a Whitney umbrella. This surface is obtained by extending the Whitney umbrella in the normal direction by i…
math.DG2025
Criteria for codimension two singularities of surfaces and their applications
Kentaro Saji, Runa Shimada
We give simple criteria for the singularities appearing on surfaces codimension less than or equal to two. As applications, we give conditions for codimension two singularities tha…