AbstractOn a Fano manifoldMwe study the supremum of the possibletsuch that there
is a Kähler metricω∈c1(M) with Ricci curvature bounded below byt. This is shown
to be the same as the maximum existence time of Aubin’s continuity path for
finding Kähler–Einstein metrics. We show that onP2blown up in one point this
supremum is 6/7, and we give upper bounds for other manifolds.
In this paper we compute the cohomology with compact supports of a
Siegelthreefold as a virtual module over the product of the Galois group of
$$\mathop \mathbb{Q}\limits^{\text{\_}} $$ over $$\mathbb{Q}$$ and the Hecke
algebra. We use a method which has been developed by Ihara, Langlands and
Kottwitz: comparison of the Grothendieck--Lefschetz formula and the
Arthur--Selberg trace formula.... hiện toàn bộ
In the previous part of this paper, we constructed a large family of Hecke
algebras on some classical groups G defined over p-adic fields in order to
understand their admissible representations. Each Hecke algebra is associated to
a pair (J Σ, ρΣ) of an open compact subgroup J Σ and its irreducible
representation ρΣ which is constructed from given data Σ = (Γ, P′0, ϱ). Here, Γ
is a semisimple elem... hiện toàn bộ
Let R k (n) denote the number of representations of a natural number n as the
sum of three cubes and a kth power. In this paper, we show that R 3 (n) ≪ n
5/9+ε, and that R 4 (n) ≪ n 47/90+ε, where ε > 0 is arbitrary. This extends work
of Hooley concerning sums of four cubes, to the case of sums of mixed powers. To
achieve these bounds, we use a variant of the Selberg sieve method introduced by
Hoo... hiện toàn bộ
A new family of Hamiltonian-minimal Lagrangian tori in the complex Euclidean
plane is constructed. They are the first known unstable ones and are
characterized in terms of being the only Hamiltonian-minimal Lagrangian tori
(with non-parallel mean curvature vector) in C2 admitting a one-parameter group
of isometries.
Chúng tôi đưa ra một bằng chứng mới cho định lý của Shiota về đoán của Novikov,
trong đó tuyên bố rằng các ký hiệu K.P. của phương trình tương ứng với các hình
học Jacobian giữa tất cả các đa tạp Abel chính xác không phân tích được.
#định lý Shiota #đoán Novikov #phương trình K.P. #hình học Jacobian #đa tạp Abel