Did Egyptians have Theoretical Mathematics?

History of Mathematics evolves. At some point the world was not communicated, therefore according to every tribe on this Earth, nobody was doing what they were doing.

Now in a globalized era all the tribes are finding out what the other tribes did. It is time to have a real History of Mathematics, where everybody is given equal time.

Egyptians used mathematics four thousand years ago, or even before, now we know they also had theories of mathematics. They used math, and knew what math was.