calculate the standard deviation in the function f where f = a + / - b , from the standard deviations of variables a and b . there must be no co-variance between a and b. concode_field_sep PlaceHolder placeHolder concode_field_sep double aA concode_elem_sep double var_aA concode_elem_sep double aA_plusMinus_bB concode_elem_sep double AB concode_elem_sep double var_AB concode_elem_sep double var_sqrt_A concode_elem_sep double ln_A concode_elem_sep double exp_A concode_elem_sep double exp_bA concode_elem_sep double var_A_plusMinus_B concode_elem_sep double var_aA_plusMinus_bB
double function ( double arg0 , double arg1 ) { return aA_plusMinus_bB ( 1 , arg0 , 1 , arg1 ) ; }