functions in dawson.i - e

             erf(x)  
 
    return erf(x), 2./sqrt(pi) * integral[0 to x](exp(-t^2)*dt)  
interpreted function, defined at i/dawson.i   line 50  

             erfc(x)  
 
    return erfc(x), 2./sqrt(pi) * integral[x to infinity](exp(-t^2)*dt)  
interpreted function, defined at i/dawson.i   line 72