code: public static double min(DoubleTuple t)
      {
          return DoubleTupleFunctions.reduce(
              t, Double.POSITIVE_INFINITY, Math::min);
      }
docs: Computes the minimum value that occurs in the given tuple,
  or <code>Double.POSITIVE_INFINITY</code> if the given tuple has a
  size of 0.
  
  @param t The input tuple
  @return The minimum value