Limit Explorer:  The table above is used to explore limits of the form
lim f(x,y)
(x,y)-->(p,q)

Enter scaling factor: .  Enter f(x,y)  and the point (p,q) below: 

f(x,y) =                        (p,q) = ( , )

When the limit converges to a number L, the numbers in the vicinity of the "zoom" button become closer and closer to L.