ELI5: Explain Like I'm 5

Cayley's sextic

Cayley's sextic is a fancy name for a special kind of math equation that looks like this: x^6 + y^6 + z^6 + u^6 + v^6 + w^6 = 0.

Imagine you had six baskets and you wanted to put some apples or oranges in each of them. The equation tells you how many apples or oranges you need to put in each basket so that the total number of apples and oranges together is zero. It's like a tricky puzzle that mathematicians like to solve just for fun.

Cayley was a smart guy who figured out a neat trick for solving this puzzle. He realized that you can turn this equation into another kind of equation, called a group equation, that's much easier to work with. It's like turning a big jigsaw puzzle into a smaller, simpler puzzle that you can actually solve.

Now, even though Cayley's sextic equation looks complicated, it's actually really important in math. It helps us understand things like symmetry and geometry, which are really important in science and engineering. Mathematicians still study Cayley's sextic today, even though it was discovered over 150 years ago!