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
This paper is devoted to the calculation of the B-model chiral ring, used in
physics, for semiample Calabi–Yau hypersurfaces. We also study the cohomology of
semiample hypersurfaces.
We give a short proof of the inner product conjecture for the symmetric
Macdonald polynomials of type An-1. As a special case, the corresponding
constant term conjecture is also proved.
We determine all the complex polynomials f(X) such that, for two suitable
distinct, nonconstant rational functions g(t) and h(t), the equality f(g(t)) =
f(h(t)) holds. This extends former results of Tverberg, and is a contribution to
the more general question of determining the polynomials f(X) over a number
field K such that f(X) − λ has at least two distinct K-rational roots for
infinitely many ... hiện toàn bộ
Let Φ(x) denote the number of those integers n with ϕ(n)≤ x, where ϕ denotes the
Euler function. Improving on a well-known estimate of Bateman (1972), we show
that Φ(x)-Ax ≪ R(x), where A=ζ(2)ζ(3)/ζ(6) and R(x) is essentially of the size
of the best available estimate for the remainder term in the prime number
theorem.