The numerical constant pi (π) has an evil twin represented by the symbol ϖ.The lemniscate constant (ϖ) is related to the lemniscate as pi is related to circles.The lemniscate constant (ϖ) has formulas and functions similar to pi.Mathematically, the lemniscate has a perimeter of 2ϖ, while a circle has a perimeter of 2π.