export declare const ERF_P = 0.3275911;
export declare const ERF_A1 = 0.254829592;
export declare const ERF_A2 = -0.284496736;
export declare const ERF_A3 = 1.421413741;
export declare const ERF_A4 = -1.453152027;
export declare const ERF_A5 = 1.061405429;