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We formulate an analogue of the Ichino-Ikeda conjectures for the Whittaker-Fourier coefficients of automorphic forms on quasi-split reductive groups. This sharpens the conjectures of Sakellaridis-Venkatesh in the case at hand.

Number Theory · Mathematics 2014-12-18 Erez Lapid , Zhengyu Mao

Morse foliations of codimension one on the sphere S^3 are studied and the existence of special components for these foliations is derived. As a corollary the instability of Morse foliations can be proven in almost all cases.

Geometric Topology · Mathematics 2022-09-23 Charalampos Charitos

In this paper, we will show that strong approximation with Brauer-Manin obstruction holds for certain quadratic fibration such that none of fibers satisfies strong approximation with Brauer-Manin obstruction. Moreover, we develop the…

Number Theory · Mathematics 2014-07-15 Fei Xu

In this partly expository paper we discuss conditions for the global injectivity of $C^2$ semi-algebraic local diffeomorphisms $f:\mathbb{R}^n \to \mathbb{R}^n$. In case $n > 2$, we consider the foliations of $\mathbb{R}^n$ defined by the…

Geometric Topology · Mathematics 2022-01-21 Francisco Braun , Luis Renato Gonçalves Dias , Jean Venato-Santos

We prove the main Conjecture 4 of our paper arXiv:1403.6061v5, which leads to classification of degenerations of codimension one of Kahlerian K3 surfaces with finite symplectic automorphism groups.

Algebraic Geometry · Mathematics 2016-07-01 Viacheslav V. Nikulin

In this paper, we develop symplectic Hodge theory on transversely symplectic foliations. In particular, we establish the symplectic $d\delta$-lemma for any such foliations with the (transverse) $s$-Lefschetz property. As transversely…

Symplectic Geometry · Mathematics 2016-09-06 Yi Lin

We show that Coulomb branches for $3$-dimensional $\mathcal{N}=4$ supersymmetric gauge theories have symplectic singularities. This confirms a conjecture of Braverman-Finkelberg-Nakajima.

Algebraic Geometry · Mathematics 2023-09-14 Gwyn Bellamy

We extend to the case of semi-abelian varieties the statements of various variants of the conjecture alla Bogomolov about the non-density of small points of small height in abelian varieties. Inspired by recent work of Ullmo, Zhang and…

Number Theory · Mathematics 2007-05-23 Antoine Chambert-Loir

We classify the Seifert fibrations of any given lens space L(p,q). We give an algorithmic construction of a Seifert fibration of L(p,q) over the base orbifold S^2(m,n) with the coprime parts of m and n arbitrarily prescribed. This algorithm…

Geometric Topology · Mathematics 2018-04-17 Hansjörg Geiges , Christian Lange

We prove Wilking's Conjecture about the completeness of dual leaves for the case of Riemannian foliations on nonnegatively curved symmetric spaces. Moreover, we conclude that such foliations split as a product of trivial foliations and a…

Differential Geometry · Mathematics 2020-06-30 Renato J. M. e Silva , Llohann D. Sperança

We compute the $\mathrm{Pin}(2)$-equivariant Seiberg-Witten Floer homology of Seifert rational homology three-spheres in terms of their Heegaard Floer homology. As a result of this computation, we prove Manolescu's conjecture that…

Geometric Topology · Mathematics 2020-02-19 Matthew Stoffregen

In this short note, we will show the following weak evidence of S. Lang conjecture over function fields. Let f : X ---> Y be a projective and surjective morphism of algebraic varieties over an algebraically closed field k of characteristic…

alg-geom · Mathematics 2008-02-03 Atsushi Moriwaki

We study a class of holomorphic foliations in (C^3,0) that can be desingularized following the same desingularization chain that a certain quasi-ordinary surface. This intends to be a generalization to the dimension three of the cuspodal…

Dynamical Systems · Mathematics 2024-09-16 Percy Fernández Sánchez , Jorge Mozo Fernández

The covariant derivative of the K\"ahler form of an almost pseudo-Hermitian or of an almost para-Hermitian manifold satisfies certain algebraic relations. We show, conversely, that any 3-tensor which satisfies these algebraic relations can…

Differential Geometry · Mathematics 2010-12-23 Miguel Brozos-Vázquez , Eduardo García-Río , Peter Gilkey , Luis Hervella

We conclude the multiple fibration problem for closed orientable Seifert three-orbifolds, namely the determination of all the inequivalent fibrations that such an orbifold may admit. We treat here geometric orbifolds with geometries…

Geometric Topology · Mathematics 2023-02-14 Oliviero Malech , Mattia Mecchia , Andrea Seppi

We establish an existence $h$-principle for symplectic cobordisms of dimension $2n>4$ with concave overtwisted contact boundary.

Symplectic Geometry · Mathematics 2020-08-04 Yakov Eliashberg , Emmy Murphy

We study 3d $\mathcal{N}=2$ supersymmetric gauge theories on closed oriented Seifert manifold---circle bundles over an orbifold Riemann surface---, with a gauge group G given by a product of simply-connected and/or unitary Lie groups. Our…

High Energy Physics - Theory · Physics 2018-11-14 Cyril Closset , Heeyeon Kim , Brian Willett

We present a variant of the classical Darboux-Jouanolou Theorem. Our main result provides a characterization of foliations which are pull-backs of foliations on surfaces by rational maps. As an application, we provide a structure theorem…

Algebraic Geometry · Mathematics 2018-05-04 Jorge Vitorio Pereira , Calum Spicer

We study holomorphic spheres in certain symplectic cobordisms and derive information about periodic Reeb orbits in the concave end of these cobordisms from the non-compactness of the relevant moduli spaces. We use this to confirm the strong…

Symplectic Geometry · Mathematics 2019-03-12 Hansjörg Geiges , Kai Zehmisch

We consider structures analogous to symplectic Lefschetz pencils in the context of a closed 4-manifold equipped with a `near-symplectic' structure (ie, a closed 2-form which is symplectic outside a union of circles where it vanishes…

Differential Geometry · Mathematics 2014-11-11 Denis Auroux , Simon K Donaldson , Ludmil Katzarkov
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