نتایج جستجو برای: codimension 2 subvarieties
تعداد نتایج: 2528055 فیلتر نتایج به سال:
According to Medvedev and Scanlon [MS14], a polynomial f(x) ∈ Q̄[x] of degree d ≥ 2 is called disintegrated if it is not conjugate to xd or to ±Cd(x) (where Cd is the Chebyshev polynomial of degree d). Let n ∈ N, let f1, . . . , fn ∈ Q̄[x] be disintegrated polynomials of degrees at least 2, and let φ = f1×· · ·×fn be the corresponding coordinate-wise self-map of (P1)n. Let X be an irreducible sub...
Chow varieties are a parameter space for cycles of a given variety of a given codimension and degree. We construct their analog for differential algebraic varieties with differential algebraic subvarieties, answering a question of [11]. The proof uses the construction of classical algebro-geometric Chow varieties, the theory of characteristic sets of differential varieties, the theory of prolon...
We introduce the notion of the projective linking number LinkP(Γ, Z) of a compact oriented real submanifold Γ of dimension 2p − 1 in complex projective n-space P with an algebraic subvariety Z ⊂ P − Γ of codimension p. This notion is related to projective winding numbers and quasi-plurisubharmonic functions, and it is generalized to any projective manifold X . It is shown that a basic conjectur...
The geometric and arithmetic properties of a smooth algebraic variety X are reflected by the configuration of its subvarieties. A principal invariant of these are the Chow groups CHp(X), defined to be the group of codimension-p algebraic cycles modulo rational equivalence. For p = 1 these groups are classical and well understood. For p > = 2 they are nonclassical in character and constitute a m...
Given a projective variety X defined over a finite field, the zeta function of divisors counts all irreducible, codimension one subvarieties of X, each measured by their projective degree. For dim(X) ≥ 2, this is a purely p-adic function. Four conjectures are expected to hold, the first of which is p-adic meromorphic continuation to the all of Cp. When the divisor class group of X has rank one,...
We give examples of subcanonical subvarieties of codimension 3 in projective n-space which are not Pfaffian, i.e. defined by the ideal sheaf of submaximal Pfaffians of an alternating map of vector bundles. This gives a negative answer to a question asked by Okonek [29]. Walter [36] had previously shown that a very large majority of subcanonical subschemes of codimension 3 in P are Pfaffian, but...
Let Y C Pm be a subvariety of codimension d defined by an ideal / in charp > 0 with //'(Y, 0 (-1)) = 0. If t is an integer greater than log (d) and Hi( Y, f/l"+i) = 0 for n » 0 and i =1,2, then Pic(Y) is an extension of a finite p-primary group of exponent at most pt by Z[ 0 (1 )1 and Br'(Y)(p) is a group of exponent at most pl'. If Y is also smooth and defined over a finite field with dim Y < ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید