### Some differential (and discrete) geometry

Γ isn’t a tensor but an affine connection is!?

Considering the Event Horizon

Progress along a null geodesic?

Feeble connection to OS ideas

A crazy idea about Dark Matter

Constant acceleration and its Event Horizon

Geometry of Special Relativity

Big Bang in 1D & 3D

Lens Thirring Rotation

See Notes on Woit’s book
and on Kennifick’s

Notes on quadrupoles

Queasy Space

finding a uniformly negatively curved 3 space in flat 4D space time

Summation Convention

Energy Conservation?
#### External

sounds and
pictures

Good black hole info,
Energy Localization,
Centennial review of G waves
### Computing GR

External: Regge, T. “General relativity without coordinates”, *Nuovo Cimento 19*, 558−571

Visualizing Mesh Adaption Metric Tensors

Shape of electromagnetic field of moving electron.

Development of simplectic methods for the metrical and electromagnetic fields

Geodesics in Kerr space
Kerr−Newman metric

Computations for the Regge Calculus

Introduction to some running code

Notions and Names

Minkowski Problem

Fanciful Link between Relativity & Numerical
Analysis

Fragmentary notes on strength of equations.

Cosmic String

Elementary Geometry on Simplicial Complexes

Some ideas for doing the Cauchy Problem

Tracing a Geodesic; geodesic inside zone

carrying a tensor across a facet

Boundary of Complex;
Scaffold

Early Code Fragments

Making movies of the Simulation

Measuring Curvature

Unit Tests

System Tests

Grasping for Inflation
Einstein’s: “The Meaning of Relativity”,
too;
Relativity: The Special and General Theory;
Baez on GR

Clark’s ‘Sacrificing Einstein’