Development and applications of DifferentialGeometry are supported in part by National Science Foundation grants OCI-1148331, DMS-071380, DMS-0410373.
The Riemann curvature tensor, its invariants, and their use in the classification of spacetimes, Jesse Hicks; Mathematical Association of America, Spring 2015 (BYU)
Geometrization Conditions for Perfect Fluids, Scalar Fields, and Electromagnetic Fields, Charles G. Torre and Dionisios Krongos
The Spacetime Geometry of a Null Electromagnetic Field, Charles G. Torre; Classical and Quantum Gravity
The Spacetime Geometry of an Electromagnetic Wave, Charles G. Torre
The Spacetime Geometry of a Null Electromagnetic Field, Charles G. Torre
New symbolic tools for differential geometry, gravitation, and field theory, Ian Anderson and Charles Torre; Journal of Mathematical Physics