Vector spaces -- Linear equations and matrices -- Linear mappings and matrices -- Determinants -- Eigenvalues and eigenvectors -- Euclidean spaces -- Quadratic equations -- Linear differential equations -- determinants.
Robert Samuel Johnson was a fighter pilot with the United States Army Air Forces (USAAF) during World War II. He is credited with scoring 27 victories during the conflict flying a Republic P-47 Thunderbolt.
Johnson was the first USAAF fighter pilot in the European theater to surpass Eddie Rickenbacker's World War I score of 26 victories.
He was awarded the Distinguished Service Cross, Silver Star, Distinguished Flying Cross (x8) and the Purple Heart.