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词条 Nodary
释义

  1. References

In physics and geometry, the nodary is the curve that is traced by the focus of a hyperbola as it rolls without slipping along the axis, a roulette curve. [1]

The differential equation of the curve is:

.

Its parametric equation is:

where is the elliptic modulus and is the incomplete elliptic integral of the second kind and sn, cn and dn are Jacobi's elliptic functions.[1]

The surface of revolution is the nodoid constant mean curvature surface.

References

1. ^John Oprea, Differential Geometry and its Applications, MAA 2007. pp. 147–148

1 : Curves

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