Lunduke mentioned, fundamentally unserious.

yeah, top-left is regular multiplication. Top-center actjally is the so-called alternating product (basically the correct way of defining the cross product).

Top-right is supposed to be the operation in a gtoup.

There’s no explicit cartesian product here but the middle one is the tensor product. The tensor prodict of sets (in so far as that statement makes sense) is the cartesian product.

:)

You know the top left one. They teach that in schools.

Set theory is relatively lawful.

Many things do use go, the issue with Java lies in its massive runtime burden (also not a great language IMO)