ELI5: Explain Like I'm 5

Teichmüller space

Teichmüller space is like a special place where we can play with shapes and patterns, like stars, flowers, and shapes with lots of corners called polygons.

But Teichmüller space is a little bit different from our normal playground because it has some special rules. One of the rules is that we can stretch and squash shapes, but we can't change how many corners they have.

Another rule is that we can only use special stretches and squashes called conformal maps. These are like magic spells that change the shape of our shapes without changing their core features.

Now imagine our playground has a bunch of different shapes and patterns, maybe some with two corners, or six corners, or even more. Teichmüller space is like a special part of our playground where we can take any of these shapes and stretch or squash them in all different ways, and see what new shapes we can create.

Scientists and mathematicians love to play in Teichmüller space because it helps them understand how shapes and patterns work, and how they relate to each other. They can even use Teichmüller space to study really complicated things like the shape of the whole universe!