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- Ph Ellia, D Franco
- 1999

One of the most attractive problems in algebraic geometry is Hartshorne’s conjecture ([9]): ”let X ⊂ P(C) be a smooth subvariety, if dim(X) > 2 3 n then X is a complete intersection”. Due to the connection with the existence of rank two vector bundles, the codimension two case is particularly interesting. Thanks to Barth’s result ([2]) and since no… (More)

- Michel Cribier, Maximilien Fechner, +6 authors Stefan Schönert
- Physical review letters
- 2011

Several observed anomalies in neutrino oscillation data can be explained by a hypothetical fourth neutrino separated from the three standard neutrinos by a squared mass difference of a few eV(2). We show that this hypothesis can be tested with a PBq (ten kilocurie scale) (144)Ce or (106)Ru antineutrino beta source deployed at the center of a large low… (More)

- Davide Franco, Steven L. Kleiman, Alexandru T. Lascu
- 2000

Our main theorem characterizes the complete intersections of codimension 2 in a projective space of dimension 3 or more over an algebraically closed field of characteristic 0 as the subcanonical and self-linked subschemes. In order to prove this theorem, we’ll prove the Gherardelli linkage theorem, which asserts that a partial intersection of two… (More)

The Cell Design System (CDS) is part of a set of tools developed in the 1970s by the Electronics Division of Xerox to support CAD design. This paper describes the CDS, which is a highly interactive graphics system used for layout of custom chips. Described are the hardware environment and language, the kinds of manipulation allowed, types of objects, and… (More)

- Ph Ellia, D Franco
- 1999

In the classification of smooth codimension two subvarieties of P, surfaces in P (resp. threefolds in P) seem to lie between two extremal situations: every curve can be embedded in P while, according to Hartshorne’s conjecture, every smooth, codimension two subvariety of P, n ≥ 6, should be a complete intersection. As well known, not every surface can be… (More)

- VINCENZO DI GENNARO, DAVIDE FRANCO
- 2006

For a projective variety Z and for any integer p, define the p-th Néron-Severi group NSp(Z) of Z as the image of the cycle map Ap(Z) → H2p(Z;C). Now let X ⊂ P (m ≥ 1) be a projective variety of dimension 2m − 1, with isolated singularities, complete intersection of a smooth hypersurface of degree k, with a hypersurface of degree n > max{k, 2m + 1}, and let… (More)

- Ph Ellia, D Franco
- 1998

where Cliff(L) := deg(L)− 2(h0(L)− 1) (see for example [CM] and [ELMS]). In the first section of this paper we consider subcanonical curves in P. Let C ⊂ P and let Γ be a point set computing the gonality of C. If l ≥ 2 represents the maximum degree of a zero-dimensional subscheme of C which is contained in a line, then d := Gon(C) = d(Γ) ≤ d(C)− l. If… (More)

- Vincenzo Di Gennaro, Davide Franco, Giambattista Marini
- 2010

By the fundamental work of Griffiths one knows that, under suitable assumption, homological and algebraic equivalence do not coincide for a general hypersurface section of a smooth projective variety Y . In the present paper we prove the same result in case Y has isolated singularities.

- Marlon Brancher, K David Griffiths, Davide Franco, Henrique de Melo Lisboa
- Chemosphere
- 2017

Exposure to environmental odour can result in annoyance, health effects and depreciation of property values. Therefore, many jurisdictions classify odour as an atmospheric pollutant and regulate emissions and/or impacts from odour generating activities at a national, state or municipal level. In this work, a critical review of odour regulations in selected… (More)