Olaus Henrici

Olaus Magnus Friedrich Erdmann Henrici, FRS
(9 March 1840, Meldorf, Duchy of Holstein – 10 August 1918, Chandler's Ford, Hampshire, England) was a German mathematician. [1]
- Skeleton of structures: especially in their application to the building of steel and iron bridges. New York: Van Nostrand, 1867.
- Congruent figures, 1878.
- Elementary geometry. London: Longmans, Green, 1879.
- Vectors and rotors, 1903.[2]