arXiv research

Holomorphic quantum modular forms linked to knot volumes.

Holomorphic volume form on circle representations generalizes Witten's formula for surfaces with boundary.

Some observations about the local and global generality of gradient Kahler Ricci solitons are made, including the existence of a canonically associated holomorphic volume form and vector field, the local generality of solutions with a prescribed holomorphic volume form and vector field, and the existence of Poincare co…

This study calculates the average number of common zeros of holomorphic functions on complex manifolds.

Study on Kähler manifolds connects curvature decay with growth of holomorphic functions.

Study shows how volume forms on degenerating varieties converge to a non-Archimedean measure.

Harmonic functions on Calabi-Yau manifolds with maximal volume growth are studied.

The goal of this paper is to study the theory of last multipliers in the framework of complex manifolds with a fixed holomorphic volume form. The motivation of our study is based on the equivalence between a holomorphic ODE system and an associated real ODE system and we are interested how we can relate holomorphic las…

A hypercomplex manifold is a manifold equipped with a triple of complex structures satisfying the quaternionic relations. A holomorphic Lagrangian variety on a hypercomplex manifold with trivial canonical bundle is a holomorphic subvariety which is calibrated by a form associated with the holomorphic volume form; this …

Study Bergman kernel and Kähler metrics on Riemann surfaces and symmetric products.

The paper derives formulas for symplectic volume forms on surface representation varieties.

We consider the Riemannian functional defined on the space of Riemannian metrics with unit volume on a closed smooth manifold M given by $R_p(g) :=\int_M|R(g)|^pdvg$ where $R(g)$, $dv_g$ denote the corresponding Riemannian curvature, volume form and p is a real number greater than or equal to 2. We prove that $R_p$ res…

Smooth complex surfaces with triple intersections using differential geometry.

On Kahler manifolds with Ricci curvature lower bound, assuming the real analyticity of the metric, we establish a sharp relative volume comparison theorem for small balls. The model spaces being compared to are complex space forms, i.e, Kahler manifolds with constant holomorphic sectional curvature. Moreover, we give a…

Study shows maps preserving volume on certain complex spaces are unique.

Projective surfaces metrisability linked to pseudo-holomorphic curves existence.

Let $D, Ω_1, ..., Ω_m$ be irreducible bounded symmetric domains. We study local holomorphic maps from $D$ into $Ω_1 \times... Ω_m$ preserving the invariant $(p, p)$-forms induced from the normalized Bergman metrics up to conformal constants. We show that the local holomorphic maps extends to algebraic maps in the rank …

In this article we prove first of all the nonexistence of holomorphic submersions other than covering maps between compact quotients of complex unit balls, with a proof that works equally well in a more general equivariant setting. For a non-equidimensional surjective holomorphic map between compact ball quotients, our…

The paper explores how vector fields relate to volume in geometric contexts.

Optimizes dimension estimate for holomorphic functions on Kähler manifolds.

The Fubini-Study metric minimizes a volume-normalized holomorphic systole in $\mathbb{C}P^n$.

Improved non-squeezing theorem for calibrated geometries proved.

Defines and classifies Thurston geometries and connects simplicial volume to Kodaira dimension.

By using asymptotic Morse inequalities we give a lower bound for the space of holomorphic sections of high tensor powers in a positive line bundle over a q-concave domain. The curvature of the positive bundle induces a hermitian metric on the manifold. The bound is given explicitely in terms of the volume of the domain…

Symplectic embeddings of balls into specific manifolds are studied, with restrictions and obstructions identified.

The paper studies quasifuchsian manifolds and their boundary foliations, providing formulas and extensions.

Study of random sections on complex spaces converging to equilibrium metrics.

The paper defines Laplace operators for algebroid spaces.

Solves embedding problem for 5D manifolds into Calabi-Yau 3-folds.

The study proves rationality of complex projective varieties with holomorphic vector fields.

Study shows how the energy of a metric on a toric variety relates to the volume of holomorphic sections.

The paper extends Schwarz's lemma to RC-positivity and complex manifolds.

We derive general expressions for the Kaehler form of the L^2-metric in terms of standard 2-forms on vortex moduli spaces. In the case of abelian vortices in gauged linear sigma-models, this allows us to compute explicitly the Kaehler class of the L^2-metric. As an application we compute the total volume of the moduli …

A Hermitian Einstein-Weyl manifold is a complex manifold admitting a Ricci-flat Kaehler covering W, with the deck transform acting on W by homotheties. If compact, it admits a canonical Vaisman metric, due to Gauduchon. We show that a Hermitian Einstein-Weyl structure on a compact complex manifold is determined by its …

Local SU(3)-structures on an oriented submanifold of Spin(7)-manifold are determined and their types are characterized in terms of the shape operator and the type of the Spin(7)-structure. An application to Bryant \cite{MR89b:53084} and Calabi \cite{MR24 #A558} examples is given. It is shown that the product of a Cayle…

We observe that an anti-symplectic manifold locally always admits a parity structure. The parity structure can be viewed as a complex-like structure on the manifold. This induces an odd metric and its Levi-Civita connection, and thereby a new notion of an odd Kaehler geometry. Oversimplified, just to capture the idea, …

Study improves variance calculation for random zero sets on complex manifolds.

A Lagrangian submanifold in an almost Calabi-Yau manifold is called positive if the real part of the holomorphic volume form restricted to it is positive. An exact isotopy class of positive Lagrangian submanifolds admits a natural Riemannian metric. We compute the Riemann curvature of this metric and show all sectional…

In this paper we present a new approach to Morse theory based on the de Rham-Federer theory of currents. The full classical theory is derived in a transparent way. The methods carry over uniformly to the equivariant and the holomorphic settings. Moreover, the methods are substantially stronger than the classical ones a…

Kahler manifolds with specific curvature properties are close to projective spaces.

Let $M$ be a complete Kähler manifold with nonnegative bisectional curvature. Suppose the universal cover does not split and $M$ admits a nonconstant holomorphic function with polynomial growth, we prove $M$ must be of maximal volume growth. This confirms a conjecture of Ni. There are two essential ingredients in the p…

We study the asymptotic behavior of the Kähler-Ricci flow on Kähler manifolds of nonnegative holomorphic bisectional curvature. Using these results we prove that a complete noncompact Kähler manifold with nonnegative bounded holomorphic bisectional curvature and maximal volume growth is biholomorphic to complex Euclide…

Local holomorphic maps preserving (p,p) forms are shown to be isometries.

In this short note, we will prove a volume stability theorem which says that if an n-dimensional toric manifold $M$ admits a $\mathbb{T}^n$ invariant Kähler metric $ω$ with Ricci curvature no less than 1 and its volume is close to the volume of $\mathbb{CP}^n$, $M$ is bi-holomorphic to $\mathbb{CP}^n$.

Study shows how certain complex geometrical structures shrink to a simpler form.

Volume of unit balls defined by quadratic differentials is not proper and has integrable volume.

Constructs a moment map for maps to balanced manifolds.

Study extends holomorphic forms on noncompact Kahler manifolds.