General #relativity has been wildly successful at describing how #gravity works and how it shapes the large-scale structure of the #universe.

#Space-time tells #matter how to move; matter tells space-#time how to curve.

Yet the #mathematics of general relativity is also profoundly counterintuitive.

What does a space look like if it is almost a #vacuum, having just a tiny amount of mass.

Is it necessarily almost flat?

#physics #cosmology
quantamagazine.org/a-century-l…

A Century Later, New Math Smooths Out General Relativity | Quanta Magazine

Mathematicians prove a theorem that illuminates the geometry of universes with tiny amounts of mass.

^{Quanta Magazine}