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Curves with closed-form solutions for arc length include the catenary, circle, cycloid, logarithmic spiral, parabola, semicubical parabola and straight line. The lack of a closed form solution for the arc length of an elliptic and hyperbolic arc led to the development of the elliptic integrals.
Surfaces that occur in two of the main theorems of vector calculus, Stokes' theorem and the divergence theorem, are frequently given in a parametric form. The curvature and arc length of curves on the surface, surface area, differential geometric invariants such as the first and second fundamental forms, Gaussian, mean, and principal curvatures ...
The length l of a parametric C 1-curve : [,] is defined as = ‖ ′ ‖. The length of a parametric curve is invariant under reparametrization and is therefore a differential-geometric property of the parametric curve.
Such a parametric equation is called a parametric form of the solution of the system. [10] ... Parametrization by arc length; Parametric derivative; Notes
12.3 Arc length. 12.4 Curvature. 13 In triangle geometry. 14 As plane sections of quadrics. ... Let the ellipse be in the canonical form with parametric equation ...
The semicubical parabola was discovered in 1657 by William Neile who computed its arc length. Although the lengths of some other non-algebraic curves including the logarithmic spiral and cycloid had already been computed (that is, those curves had been rectified ), the semicubical parabola was the first algebraic curve (excluding the line and ...
Since is an arbitrary "square of the arc length", completely defines the metric, and it is therefore usually best to consider the expression for as a definition of the metric tensor itself, written in a suggestive but non tensorial notation: = This identification of the square of arc length with the metric is even more easy to see in n-dimensional general curvilinear coordinates q = (q 1, q 2 ...
For a parametric equation of a parabola in general ... The second polar form is a special case of a ... The length of the arc between X and the symmetrically ...