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We introduce a trick of dealing with $L^2$ estimates of $\bar{\partial}$ with singular weights on complete K\"ahler domains.

Complex Variables · Mathematics 2016-04-05 Bo-Yong Chen

The classical $L^2$ estimate for the $\overline{\partial}$ operators is a basic tool in complex analysis of several variables. Naturally, it is expected to extend this estimate to infinite dimensional complex analysis, but this is a…

Functional Analysis · Mathematics 2020-02-18 Jiayang Yu , Xu Zhang

We prove an $L^2$-$\partial\overline\partial$-Lemma involving smooth square integrable forms on complete K\"ahler manifolds, provided that the unique self-adjoint extension of the Hodge Laplacian on the Hilbert space of $L^2$-forms has a…

Differential Geometry · Mathematics 2026-02-10 Riccardo Piovani

We establish H\"ormander-type $L^2$-estimates for the $\overline{\partial}$-operators that hold uniformly for all nontrivial flat holomorphic line bundles on compact K\"ahler manifolds. Our result can be regarded as a…

Complex Variables · Mathematics 2023-04-04 Yoshinori Hashimoto , Takayuki Koike

Associated with a smooth, $d$-closed $(1, 1)$-form $\alpha$ of possibly non-rational De Rham cohomology class on a compact complex manifold $X$ is a sequence of asymptotically holomorphic complex line bundles $L_k$ on $X$ equipped with $(0,…

Algebraic Geometry · Mathematics 2012-01-04 Dan Popovici

We study Laplace eigenvalues $\lambda_k$ on K\"ahler manifolds as functionals on the space of K\"ahler metrics with cohomologous K\"ahler forms. We introduce a natural notion of a $\lambda_k$-extremal K\"ahler metric and obtain necessary…

Differential Geometry · Mathematics 2015-02-03 Vestislav Apostolov , Dmitry Jakobson , Gerasim Kokarev

This paper is the second part of our series of works to establish $L^2$ estimates and existence theorems for the $\overline{\partial}$ operators in infinite dimensions. In this part, we consider the most difficult case, i.e., the underlying…

Functional Analysis · Mathematics 2024-05-24 Zhouzhe Wang , Jiayang Yu , Xu Zhang

We consider linear elliptic and parabolic equations with measurable coefficients and prove two types of $L_{p}$-estimates for their solutions, which were recently used in the theory of fully nonlinear elliptic and parabolic second order…

Analysis of PDEs · Mathematics 2012-01-24 N. V. Krylov

In this paper, we will construct H\"ormander's $L^2$-estimate of the operator $d$ on a flat vector bundle over a $p$-convex Riemannian manifold and discuss some geometric applications of it. In particular, we will generalize the classical…

Differential Geometry · Mathematics 2025-01-13 Gang Huang , Weiwen Jiang , Xiangsen Qin

This is a survey article about $L^2$ estimates for the $\bar \partial$ operator. After a review of the basic approach that has come to be called the "Bochner-Kodaira Technique", the focus is on twisted techniques and their applications to…

Complex Variables · Mathematics 2015-03-02 Jeffery D. McNeal , Dror Varolin

The motivation of the note is to obtain a H\"{o}rmander-type $L^2$ estimate for $\bar\partial$ equation. The feature of the new estimate is that the constant is independent of the weight function. Moreover, our estimate can be used for…

Complex Variables · Mathematics 2024-03-20 Bingyuan Liu

We give a H\"ormander type $L^2-$estimate for the $\bar{\partial}-$equation with respect to the measure $\delta_\Omega^{-\alpha}dV$, $\alpha<1$, on any bounded pseudoconvex domain with $C^2-$boundary. Several applications to the function…

Complex Variables · Mathematics 2013-03-29 Bo-Yong Chen

In this paper we apply the hyper-K\"ahler quotient construction to Lie groups with a left invariant hyper-K\"ahler structure under the action of a closed abelian subgroup by left multiplication. This is motivated by the fact that some known…

Differential Geometry · Mathematics 2007-05-23 M. L. Barberis , I. Dotti , A. Fino

Suppose that a polarised K\"ahler manifold $(X,L)$ admits an extremal metric $\omega$. We prove that there exists a sequence of K\"ahler metrics $\{ \omega_k \}_k$, converging to $\omega$ as $k \to \infty$, each of which satisfies the…

Differential Geometry · Mathematics 2020-03-09 Yoshinori Hashimoto

We develop a new approach to $L^{\infty}$-a priori estimates for degenerate complex Monge-Amp\`ere equations on complex manifolds. It only relies on compactness and envelopes properties of quasi-plurisubharmonic functions. Our method allows…

Complex Variables · Mathematics 2021-06-09 Vincent Guedj , Chinh H. Lu

We prove certain $L^p$ Sobolev-type inequalities for twisted differential forms on real (and complex) manifolds for the Laplace operator $\Delta$, the differential operators $d$ and $d^*$, and the operator $\bar\partial$. A key tool to get…

Analysis of PDEs · Mathematics 2025-01-13 Fusheng Deng , Gang Huang , Xiangsen Qin

Under various conditions, we establish Schauder estimates for both divergence and non-divergence form second-order elliptic and parabolic equations involving H\"older semi-norms not with respect to all, but only with respect to some of the…

Analysis of PDEs · Mathematics 2017-10-13 Hongjie Dong , Seick Kim

For any Lagrangean K\"ahler submanifold $M \subset T^*{\Bbb C}^n$, there exists a canonical hyper K\"ahler metric on $T^*M$. A K\"ahler potential for this metric is given by the generalized Calabi Ansatz of the theoretical physicists…

Algebraic Geometry · Mathematics 2009-09-25 Vicente Cortés

We introduce and discuss the method of Linear Delta Expansion for the calculation of effective potentials in superspace, by adopting the improved version of the super-Feynman rules. Calculations are carried out up to two-loops and an…

High Energy Physics - Theory · Physics 2008-11-26 M. C. B. Abdalla , J. A. Helayël-Neto , Daniel L. Nedel , Carlos R. Senise

For high power $k$, the $L^2$-estimates for the Dirac-Dolbeault operator with coefficient $L^k\otimes E$ can be obtained from the Bochner-Kodaira-Nakano identity if $L$ has positive curvature. In this article, we generalize the classical…

Complex Variables · Mathematics 2023-10-25 Ming-Yuan Chang
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