Erfc

Erfc[z] gives the complementary error function erfc(z) = 1 - erf(z).

Examples

Complementary error function:

Erfc[0]
(* 1 *)

Erfc[Infinity]
(* 0 *)

Numerical evaluation:

N[Erfc[1]]
(* 0.157299 *)

Relation to Erf:

Erfc[x] + Erf[x] == 1
(* True *)

Please visit the official Wolfram Language Reference for more details.