(d**2)x/dy**2 + (d**2)y/dr**2 =(d**2)r/dy**2
– Stoke’s Theorum of the expression through a pipe (for cool skating – jislaaik!)
(Not really but I say it’s a cool idea.)
d/dx of the one is the same as the other so too is the right and the left and it goes to sow that none is the same.
Using Number Theory.