User:James8854clerk/sandbox

Using the sandbox.

Article Idea 1: Paradigms in Physics

Article Idea 2: Null Infinity (Unfinished Article for WikiProjects physics relativity taskforce)

Sources:

Hawking and Ellis

D'Inverno (?)

Conformal Null Infinity Does Not Exist for Radiating Solutions in Odd Spacetime Dimensions (Wald & Hollins)

-Tevian's Paper

In general relativity, null infinity refers to the region of spacetime which is the terminus of lightlike paths. This region can be formalized by undergoing a conformal compactification, and is closely associated with the coordinate transformation to Penrose diagram coordinates.

Null infinity has the topological structure $\mathbb{R} \times \mathbb{S}^2$, corresponding to a higher dimensional cylindrical symmetry.