Proceedings of the Edinburgh Mathematical Society, Volumi 11-12

algebra angle appears apply associative becomes called centre College cône consider constant construction continuous convergence corresponding definition denote describe determined direction distance draw drawn Edinburgh elastic equal equation expression FIGURE finite forces four Fourier function fundamental geometrical given gives Hence important infinite inscribed integral intersection John joining layer less limit Mathematical means meet memoir method mid point nature nine-point circle obtained operation parallel particular passes perpendicular plane positive present problem Professor proof properties proved quantities quaternion question radius reference regarded represented respectively School shows sides similar solution square straight line stress suppose surface tangent theorem touches triangle triangle ABC unit University vector