Cambridge Mathematical Journal, Volumen4

a₁ angles apply assume asymptotes axes axis becomes c²x² centre of gravity co-ordinates coefficients condition conic section considered cos² curve deduced denote determine df df differential equations dR dR dt dt dt dx dx dx dy dx² eccentric anomalies ellipsoid equal exact differential expression finite formula given Hence homogeneous function integral intersect isothermal Journal limits linear lines of curvature magic square magnet method molecules motion Multiply negative obtained orthogonal paper partial differential equations perpendicular plane positive quantities respectively result roots satisfied second order sin² substituting suppose surface surfaces of revolution system of equations tangent theorem transformation u₁ V₁ values variables whence x₁ Y₁ zero αλ ΣΣ