Definition:Plastic Constant

Definition
The plastic constant is the real root of the cubic:
 * $x^3 - x - 1 = 0$

Its value is approximately:


 * $P = 1 \cdotp 32471 \, 795 \ldots$

Also known as
The plastic constant is also known as:
 * the plastic number
 * the plastic ratio
 * the minimal Pisot number
 * the platin number
 * the silver number (not recommended as there is another constant with that name)
 * Siegel's number (for )
 * le nombre radiant (French for the radiant number).

Some sources identify it with the symbol $\rho$.

Also see

 * Plastic Constant is Smallest Pisot-Vijayaraghavan Number


 * Value of Plastic Constant