On osculating cones and the Riemann-Kempf singularity theorem for hyperelliptic curves, trigonal curves, and smooth plane quintics
Un procedimento induttivo per esprimere ogni insieme algebrico in come intersezione di n ipersuperfici
In this paper we give an inductive procedure in order to describe every algebraic set in as the intersection of n hypersurfaces; this is obtained by taking into account a paper of Eisenbud and Evans.
Su certi fibrati in coniche di , alcuni dei quali unirazionali e non razionali
In this note we show that every smooth “general enough” hypersurface of bidegree with in is an ordinary non rational conic-bundle. Moreover we construct an example, for , which is unirational.
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