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.
Last name: Chapman. This ancient, popular, and very important surname is of Olde English, German and Anglo-Saxon pre 5th century origins. Spelt in several ways including Chapman, Chipman, and Chipper (English), Kauf, Kaufman and Kaufler Austro-German), and Koopman (Danish), Coopman and de Copeman (Flemish), this is an occupational name for a merchant or trader.