In particular his theory of representations of semisimple groups, developed during 1924-26, was very deep and considered by Weyl himself to be his greatest achievement.
Sa mga partikular na sa kanyang teorya ng isinasaad ng semisimple grupo, binuo sa panahon ng 1924-26, ay mahimbing at itinuturing ng Weyl kanyang sarili sa kanyang pinakamalaking tagumpay.