Frenet-Serret formulas

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Frenet-Serret formulas

[fre′nā sə′rā ‚fōr·myə·ləz]
(mathematics)
Formulas in the theory of space curves, which give the directional derivatives of the unit vectors along the tangent, principal normal and binormal of a space curve in the direction tangent to the curve. Also known as Serret-Frenet formulas.
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References in periodicals archive ?
This trihedron is called pseudo-Galilean Frenet trihedron (Figure 1) [3].
For the pseudo-Galilean Frenet trihedron of an admissible curve r given by (2.