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    Helicoid

    Example plots

    Example plots

    Equations

    x(u, v) = u cos(v)
y(u, v) = u sin(v)
z(u, v) = c v

    y = x tan(z/c)

    Surface properties

    g = 0

    ds^2 = 1 du^2 + c^2 + u^2 dv^2

    dA = sqrt(c^2 + u^2) du dv

    K(u, v) = -c^2/(c^2 + u^2)^2

    Metric properties

    g_(uu) = 1
g_(vv) = c^2 + u^2

    Γ | u | 
 | | vv = -u
Γ | v | 
 | | uv = u/(c^2 + u^2)
Γ | v | 
 | | vu = u/(c^2 + u^2)

    E(u, v) = 1
F(u, v) = 0
G(u, v) = c^2 + u^2

    e(u, v) = 0
f(u, v) = -c/sqrt(c^2 + u^2)
g(u, v) = 0

    Vector properties

    left double bracketing bar x(u, v) right double bracketing bar = sqrt(c^2 v^2 + u^2)

    N^^(u, v) = (-(sin(v) c)/sqrt(u^2 + c^2), (cos(v) c)/sqrt(u^2 + c^2), -u/sqrt(u^2 + c^2))

    Properties

    minimal surfaces | right conoid | ruled surfaces

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