Original: AndrÃ - Marie AmpÃ re ( 20 January 1775 â '' 10 June 1836 ) was a French physicist and mathematician who is generally regarded as one of the main discoverers of electromagnetism .
Simplified: AndrÃ - Marie AmpÃ re ( January 20 , 1775 â '' June 10 , 1836 ) was a French physicist and mathematician who helped discover electromagnetism .