Srinivasa Ramanujan FRS (pronunciation: /ˈʃriːniˌvɑːsə ˈrɑːmɑːˌnʊdʒən/; 22 December 1887 – 26 April 1920) was an Indian mathematician and autodidact during the British Raj. Though he had almost no formal training in pure mathematics, he made major contributions to mathematical analysis, number theory, infinite series, and continued fractions. Ramanujan initially developed his own mathematical research in isolation; it was quickly recognized by Indian mathematicians. When his skills became obvious and known to the wider mathematical community, centred in Europe at the time, he began a partnership...