Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 553
onic is symmetricin each point of the line drawn through the center of the conicparallel to the rulings. This line is called the axis of thecylinder. Sections of Quadric Cylinders. The curve in which a quadriccylinder is met by a plane, M, which is not parallel to the rul-ings, we shall call a… … Fig. 2 central conic. Let Jif intersect the plane Koi Din the line L*As coordinate axes in K take Ox parallel to L and Oy perpen-dicular to L, as shown. Theequation of D, referred to theseaxes, is of the form (Ch. XII,§3): (3) Ax- + Bxy + (7/ + F= 0. Draw in M the rectangularaxes, Ox, Oy,whose…
