static private double calcLogProbAtMu(double mu){
  final double sigma=calcSigmaFromMu(mu);
  return (-s_logSqrtTwoPi - Math.log(sigma));
}

static private double calcLogProbAtMu ( double mu ) { final double sigma = calcSigmaFromMu ( mu ) ; return ( - s_logSqrtTwoPi - Math . log ( sigma ) ) ; }
calculate the log probability for a normally distributed message centered at mu .
