Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Ferruccio Orecchia"'
Autor:
Ferruccio Orecchia, Luca Chiantini
The series is aimed specifically at publishing peer reviewed reviews and contributions presented at workshops and conferences. Each volume is associated with a particular conference, symposium or workshop. These events cover various topics within pur
Autor:
Ferruccio Orecchia, Isabella Ramella
Publikováno v:
Academia Letters.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15b8ddcdf0fcfcf1e0b54e196765e5bc
https://doi.org/10.20935/al4717
https://doi.org/10.20935/al4717
Autor:
Ferruccio Orecchia, Isabella Ramella
Publikováno v:
Mediterranean Journal of Mathematics. 17
Let A be the local ring, at a singular point P, of an algebraic variety $$V\subset {\mathbb {A}}^{r+1}_k$$ of multiplicity $$e=e(A)>1$$. If V is a curve in Orecchia (Can Math Bull 24:423–431, 1981) P was said to be an ordinary singularity when V ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::caefb31f05a8d95bb219808e95f2de3a
https://doi.org/10.1007/s00009-020-01516-4
https://doi.org/10.1007/s00009-020-01516-4
We explicitly fix a mistake in a preliminary statement of our previous paper on the conductor at a multiplanar singularity. The correction is not immediate and, though the mistake does not affect correctness of the subsequent results, the wrong state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::061305075198a78ac8d21cc21a0443b4
Autor:
Ramella Isabella, Ferruccio Orecchia
The paper extends to an algebraic variety V of any dimension previous results of the authors for curves and algebraic surfaces. We compute the conductor of the local ring A of V at a singular isolated point with tangent cone consisting of a union of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3730::c880b4c48beee562f855933576bd2d1f
http://hdl.handle.net/11588/760761
http://hdl.handle.net/11588/760761
Autor:
Ramella Isabella, Ferruccio Orecchia
Given a parametric polynomial representation of an algebraic Hypersurface S in the projective space we give a new algorithm for finding the implicit cartesian equation of S. The algorithm is based on finding a suitable finite number of points on S an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3730::c646a09d2f8d9f92b182a8f09952b8f1
http://hdl.handle.net/11588/760744
http://hdl.handle.net/11588/760744
Autor:
Isabella Ramella, Ferruccio Orecchia
Publikováno v:
Ricerche di Matematica. 63:249-254
Let $$A$$ be the local ring, at a singular isolated point $$P$$ of an affine irreducible algebraic variety $$V$$ , with regular normalization. Let $$\mathfrak p$$ be the prime ideal of $$A$$ corresponding to $$V$$ . In this paper we study the minimal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ceb920cf55b72e5c2526caf2ab58ba74
https://doi.org/10.1007/s11587-014-0205-9
https://doi.org/10.1007/s11587-014-0205-9
Autor:
Margherita Guida, Ferruccio Orecchia
Publikováno v:
Ricerche di Matematica. 63:329-334
In this paper we compute the Hilbert function and the Hilbert polynomial of the projective closure of a set of lines in the affine space \({\mathbb A}^n_K\), which are parallel to the coordinate axes and pass through a lattice of points. These result
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3a956ccf45f965832df43c26a0e26ce
https://doi.org/10.1007/s11587-014-0184-x
https://doi.org/10.1007/s11587-014-0184-x
Autor:
Ferruccio Orecchia, Isabella Ramella
Publikováno v:
Applied Mathematical Sciences. 8:6805-6812
Let C be a projective algebraic curve. Suppose that C has ordinary singularities (with reduced tangent cones). In this paper we construct an ecient algorithm for computing locally, with polynomial computa- tional cost, the largest adjoint ideal of C.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3164823fac45696468eeb8e87eaf08ff
https://doi.org/10.12988/ams.2014.49697
https://doi.org/10.12988/ams.2014.49697
Publikováno v:
Communications in Algebra. 36:2969-2978
Let A be a noetherian local k-algebra with residue field k and associated graded ring G(A). Let 𝔟 be the conductor of A in its normalization , which we assume to be regular and finite over A. Assume also that Proj(G(A)) is reduced and . Let r be t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::008971365d8b7656f7aeb85f9c2fe52e
https://doi.org/10.1080/00927870802110367
https://doi.org/10.1080/00927870802110367