where erfc ( z ) {\displaystyle {\textrm {erfc}}(z)} is the complementary error function. The shift parameter μ {\displaystyle \mu } has the effect of shifting the curve to the right by an amount μ {\displaystyle \mu } , and changing the support to the interval [ μ {\displaystyle \mu } , ∞ {\displaystyle \infty } ). Like all stable distributions, the Levy distribution has a standard form f(x;0,1) which has the following property: