The harmonic mean is the special case of the power mean and is one of the Pythagorean means. In older literature, it is sometimes called the subcontrary mean. The volume-to-surface area ratio for a cylindrical container with height and radius and the mean curvature of a general surface are related to the harmonic mean.
The name SMITH is probably the most common of all surnames. The only names that give it any competition for this title would be Jones and Johnson. The most widely accepted derivation of the name is from the Anglo-Saxon SMITAN and the Germanic verb âSmioanâ meaning to smite or strike.
The surname Smith is famous for being ordinary! The spelling variations of the name as Smith, Smyth, Smithe, Smythe, is of little historical significance and probably only reflects the writing styles of the day. It is the fifth most common surname in Ireland, and the most common name in England, Scotland and Wales.