Published online by Cambridge University Press: 15 September 2014
The properties of “triply orthogonal” systems of surfaces have been examined by various writers and in considerable detail; but those of triple systems generally have not hitherto received the same attention. It is the purpose of this paper to discuss non-orthogonal systems, and to investigate formulæ in terms of the “oblique” curvilinear coordinates u, v, w which such a system determines.
page 194 note * “On Congruences of Curves,” Proc. Lond. Math. Soc., 1926.
page 196 note * See the author's Elementary Vector Analysis, Art. 46.
page 197 note * See the author's Advanced Vector Analysis, Art. 3.
page 198 note * Elementary Vector Analysis, Art. 47.
page 199 note * Advanced Vector Analysis, Art. 7.
page 200 note * “On Differential Invariants in Geometry of Surfaces, etc.,” § 4, Quarterly Journal of Mathematics, vol. 1, pp. 230–269 (1925)Google Scholar.
page 201 note * Usually denoted by E, F, G.
page 201 note † See the author's Differential Geometry, Art. 26, or Forsyth, Differential Geometry, Art. 28.
page 202 note * See § 6 of a recent paper by the author entitled “On Congruences of Curves,” Proc. Lond. Math. Soc., 1926.
page 202 note † Ibid., § 7.
page 203 note * “On Congruences of Curves,” § 5.
page 203 note † Ibid., § 9.