Charles Proteus Steinmetz
Steinmetz, Charles Proteus (1865–1923), German-born U.S. mathematician, electrical engineer, and politician. He is best known for his calculation of hysteresis loss (loss of efficiency from certain magnetic effects in alternating current). A Socialist, Steinmetz was forced to emigrate to the United States in 1889. He began his career as a researcher for General Electric Company in 1892. He also held U.S. political office as a Socialist.