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Construction of the limaçon r = 2 + cos(π – θ) with polar coordinates' origin at (x, y) = ( 1 / 2 , 0). In geometry, a limaçon or limacon / ˈ l ɪ m ə s ɒ n /, also known as a limaçon of Pascal or Pascal's Snail, is defined as a roulette curve formed by the path of a point fixed to a circle when that circle rolls around the outside of a circle of equal radius.
The inner loop is defined when + on the polar angle interval / /, and is symmetric about the polar axis. The point furthest from the pole on the inner loop has the coordinates ( a , 0 ) {\displaystyle (a,0)} , and on the polar axis, is one-third of the distance from the pole compared to the furthest point of the outer loop.
The epitrochoid with R = 3, r = 1 and d = 1/2. In geometry, an epitrochoid (/ ɛ p ɪ ˈ t r ɒ k ɔɪ d / or / ɛ p ɪ ˈ t r oʊ k ɔɪ d /) is a roulette traced by a point attached to a circle of radius r rolling around the outside of a fixed circle of radius R, where the point is at a distance d from the center of the exterior circle.
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The string compass drawing tool has various modifications and designs, and this construction method is reminiscent of string-based methods for creating ellipses (with two fixed pins). Yet another mechanical method is a variant of the previous string compass method, providing greater precision and more flexibility.
Usually the string has to be disentangled from the wire. Unclosed loose string subgroup: The pieces of string are not closed, and are not attached to the wire. In this case the ends of the string are fitted with a ball, cube or similar which stops the string from slipping out too easily. Usually the string has to be disentangled from the wire.
Lah number-- Lahun Mathematical Papyri-- Lakes of Wada-- Lakh-- Lam's problem-- Laman graph-- Lamb–Oseen vortex-- Lamb vector-- Lambda calculus-- Lambda calculus ...
The Chern-Simons gauge theory lives in 3 spacetime dimensions. More generally, there exists higher dimensional topological quantum field theories. There exists more complicated multi-loop/string-braiding statistics of 4-dimensional gauge theories captured by the link invariants of exotic topological quantum field theories in 4 spacetime ...