Similar to 掛谷集合

2

3

4

5

6

7

8

9

11 (number)

13 (number)

Discrete geometry

Disk covering problem

Carathéodory's theorem (convex hull)

Sphere packing

Guillotine cutting

Honeycomb (geometry)

Krein–Milman theorem

Kepler conjecture

Arc (projective geometry)

Centroidal Voronoi tessellation

Kissing number

Moving sofa problem

Dissection problem

Thomson problem

Delaunay triangulation

Kobon triangle problem