Here’s something a friend of mine whose friend of him showed him.
IDon’t know if this is new or really old. I coludn’t find it on the Internet :).
Greets from Mexico.
Eduardo Silva.
(Thanks for submitted, Eduardo!)
(via tangeroonmacaroonpeachplumpear)
graph of z=2x^2+2y^2+4
cosine graph
The mo’ money we come across, the more problems we see.
via Jamphat.
graph of z=x²-y²
20
graph
