Charles Hellaby is an associate professor of applied mathematics at the University of Cape Town, South Africa. He is a member of the Bahá'í Faith. His research interests include:
Inhomogeneous cosmology. Standard cosmology assumes a smooth homogeneous universe, but the real universe is very lumpy
Inhomogeneous cosmological models - their evolution, geometry and singularities
Non-linear structure formation in the universe
Extracting the geometry of the cosmos from observations
The Lemaitre–Tolman cosmological model
The Szekeres cosmological model
Junction conditions in GR
Dense black holes
Local inhomogeneities and the Swiss cheese model
He has also worked on
The models of Vaidya, Schwarzschild–Kruskal–Szekeres & Kinnersley
Classical signature change
Cosmic strings
Gravitational collapse
