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On isolated singularities of surfaces which do not affect the conditions of adjunction (Part I.)

  • Patrick Du Val (a1)

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By an isolated singularity of an algebraic surface in [r] (i.e. space of r dimensions) I shall mean one which not merely is not upon any branch of a multiple curve of the surface, but has also the property that when the surface is projected into [3] from a general space [r − 4] the singular point remains in isolation, i.e. no branch of the double curve created by the projection will of necessity pass through it.

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Enriques, F. and Campedella, L., Lezioni sulla teoria delle superficie algebriche, § 39.

Actually, Coxeter uses N 0, …, N n−1, etc., but the alteration introduced here seems to make for convenience.

Salmon, , Analytical geometry of three dimensions, vol. 2 (1915), art. 522.

Klein, Felix, Gesammelte mathematische Abhandlungen, 2, p. 11 = Math. Ann. 6 (1873), 551.

Enriques and Campedella, op. cit. § 59.

Enriques and Campedella, op. cit. § 60.

Coxeter, H. S. M., “The polytopes with regular prismatic vertex figures, Part 2,Proc. Lond. Math. Soc. (2), 34 (1932), 126189 (135151).

See Coxeter, loc. cit. p. 137.

On isolated singularities of surfaces which do not affect the conditions of adjunction (Part I.)

  • Patrick Du Val (a1)

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