Published online by Cambridge University Press: 24 October 2008
1. In this paper I discuss the expression of m + 1 general forms F, F′, …, F(m), each of order n and homogeneous in r + 1 variables z0, z1, …, zl, …, zr, as the sums each of the nth powers of (the same) h + H linear forms in these variables. I take h > 0 of these linear forms to be undetermined, namely the forms
whose coefficients are undetermined; and I take the remaining H ≥ 0 linear forms to be assigned, namely the forms
whose coefficients are assigned.
* This theorem is given by Terracini, A., Annali di Matematica (3), 24 (1915), 1CrossRefGoogle Scholar —a paper not known to me at the time the present paper was written. A. Terracini's paper also contains a proof of the well-known theorem of Em. Lasker and E. K. Wakeford, quoted by me in Proc. Camb. Phil. Soc. 29 (1933), 71Google Scholar; a reference to it should therefore be inserted in the footnote to that page.
† Richmond, H. W., Quart. J. of Math. 33 (1902), 331.Google Scholar
* See, for example, Salmon, G., Geometry of Three Dimensions, i, 5th edn. (1912), p. 242.Google Scholar
* For these and subsequent examples, see Severi, F., Rend. di Palermo, 15 (1901), 33.CrossRefGoogle Scholar
* Severi, F., Rend. di Palermo, 15 (1901), 33.CrossRefGoogle Scholar