ELI5: Explain Like I'm 5

Floer homology

Floer homology is an advanced way to talk about how two shapes or topological spaces can be linked. To understand it, think of two shapes that fit perfectly into each other. In mathematics, they are said to be 'linked,' and a study called floer homology can help describe how they are connected. Floer homology uses a complicated set of equations and diagrams to show how different parts of the shapes interact with each other, from the tiny pieces all the way to the overall shape.