2000 Mathematics Subject Classification: 14H45, 14H50, 14J26.We construct linearly normal curves covering a big range from P^n, n ≥ 6 (Theorems 1.7, 1.9). The problem of existence of such algebraic curves in P^3 has been solved in [4], and extended to P^4 and P^5 in [10]. In both these papers is used the idea appearing in [4] and consisting in adding hyperplane sections to the curves constructed in [6] (for P^3) and [15, 11] (for P^4 and P^5) on some special surfaces. In the present paper we apply the same idea to the curves lying on some rational surfaces from P^n, constructed in [12, 3, 2] (see [13, 14] also).Work partially supported from the CERES Program of the Romanian Ministry of Education and Research, Contract 152/2001 and EURROMMAT...
Let X _ P6 be a smooth irreducible projective threefold, and d its degree. In this paper we prove th...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Let $C$ be an irreducible projective curve of degree $d$ in $\mathbb{P}^3$, defined over $\overline{...
Let $C \subset \mathbf{P}^3$ be an integral projective curve not contained in a quadric surface. Set...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
AbstractFix an integral variety X⊂Pn, P∈Pn, and an integer k>0. Let S(X,P,k) be the set of all subse...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
Let $C \subset \mathbf{P}^3$ be an integral projective curve not contained in a quadric surface. Set...
We describe all degree n+3 non degenerate surfaces in P^(n+4), n 651, connected in codimension 1, wh...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Let X _ P6 be a smooth irreducible projective threefold, and d its degree. In this paper we prove th...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Let $C$ be an irreducible projective curve of degree $d$ in $\mathbb{P}^3$, defined over $\overline{...
Let $C \subset \mathbf{P}^3$ be an integral projective curve not contained in a quadric surface. Set...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
In this paper we consider the nondegenerate projectively Cohen-Macaulay (p.C.M.) surfaces of small d...
AbstractFix an integral variety X⊂Pn, P∈Pn, and an integer k>0. Let S(X,P,k) be the set of all subse...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
Let $C \subset \mathbf{P}^3$ be an integral projective curve not contained in a quadric surface. Set...
We describe all degree n+3 non degenerate surfaces in P^(n+4), n 651, connected in codimension 1, wh...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
An integral and non-degenerate curve $C\subset \mathbb {P}^r$ is said to be ordinary (Gruson, Hantou...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Let X _ P6 be a smooth irreducible projective threefold, and d its degree. In this paper we prove th...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...
Fix integers r >= 4 and i >= 2 (for r = 4 assume i >= 3). Assume that the rational number s...