He developed this theory between 1894 and 1904 and applied his theory of exterior differential forms to a wide variety of problems in differential geometry, dynamics and relativity.
Siya binuo theory na ito sa pagitan ng 1894 at 1904 at inilapat sa kanyang teorya ng panlabas kaugalian forms sa isang iba't ibang mga problema sa kaugalian geometry, dinamika at kapamanggitan.