Level surface of f(x,y,z)
Author: Joseph Lo

$f(x,y,z) = x^2 + y^2 - z^2$

Level surface at

k = -1 (slider from -1 to 1, step 0.05)
rmin = Max(0, (sgn(k) * sqrt(abs(k))))
tmaxx34 = 2
rmax: sqrt(k + 4)
S1 = Surface((r * cos(t)), (r * sin(t)), sqrt(r^(2) - k), r, rmin, rmax, t, -3.14159, 3.141592653589793)
S2 = Surface((r * cos(t)), (r * sin(t)), (-sqrt(r^(2) - k)), r, rmin, rmax, t, -3.14159, 3.141592653589793)
tmaxy34 = 2
text1: "$f(x,y,z) = " + (LaTeX[k]) + "$"
text3: "The value of f(x,y,z) at any
point on the surface is " + k + "."