# A Common Generating Set of Equations

- Author:
- Simona Riva

- Topic:
- Algebra, Equations, Parametric Curves

There is a whole family of curves (including knots) which are defined by the equations:
that we usually use to convert from polar to Cartesian coordinates.
For the knot in the app below, , and are functions of a parameter , as follows:
To rotate the view, right click and drag, or use the predefined gestures on mobile devices.

For the knot in the app below,

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