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Published online by Cambridge University Press: 24 October 2008
J. A. Todd has enunciated the following theorem:
“If the canonical adjoints ∑ of an irreducible curve Γ contain fixed parts, then, if Γ is not elliptic, all the fixed curves are simple, rational, determined uniquely by the base points, which present independent conditions for them, and have no free intersections with each other or with the variable part of the system ∑.”
* Todd, J. A., “On the determination of plane curves by means of assigned singularities”, Proc. Camb. Phil. Soc. 27 (1931), 291–305 (298).CrossRefGoogle Scholar