Poinsot's spirals

Template:Short description Template:One source In mathematics, Poinsot's spirals are two spirals represented by the polar equations

$r=a\mathrm{csch}(n\theta )$

$r=a\mathrm{sech}(n\theta )$

where csch is the hyperbolic cosecant, and sech is the hyperbolic secant. They are named after the French mathematician Louis Poinsot.

Examples of the two types of Poinsot's spirals

Template:Center

Template:Center

See also

• Template:Annotated link

References

Template:Geometry-stub