"It can be argued that the mathematics behind these images is even prettier than the pictures themselves." Robert L. Devaney
"We choose to do mathematics, not because it is easy, but because it is hard."user "Haskell Curry "You don't need to be a mathematician to appreciate the impressive beauty of fractals, and many times intuition and curiosity are two of the more important ingredients that drive mathematical discovery. Víctor José García Garrido
"whereas mathemathical idea is a timless thing, few things are more ephemeral then computer hardware and software" Tristan Needham in Visual Complex Analysis
Morse theory relates critical points of a function on a manifold (geometry) to the topology of the manifold
Computational Geometry has immediate applications in many other research areas, including computer graphics, mesh generation, geographic information systems, VLSI design, and robotics
Specific problems
convex hulls
Voronoi diagrams
line segment intersection
polygon triangulation
geometric range searching
low-dimensional linear programming
geometric shortest paths
visibility
parts
Discrete geometry ( it includes Digital geometry = computer graphics and image analysis, Geometry processing = mesh processing )