## The mathematics behind general relativity

### The Singularity Theorem (Nobel Prize in Physics 2020)

In 2020, Roger Penrose was awarded half of the Nobel prize in physics for proving that black hole formation is a robust prediction of Einstein’s general theory of relativity.

### From soap bubbles to Einstein

Most readers will know them from childhood: soap bubbles

### The many ways of building an empty, unchanging universe

More information on one particular answer to the question of how much variety is permitted in general relativity – how many ways are there of constructing a universe that is completely empty of all matter?