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In this paper we describe all invariant complex Dirac structures with constant real index on a maximal flag manifold in terms of the roots of the Lie algebra which defines the flag manifold. We also completely classify these structures…

Differential Geometry · Mathematics 2023-06-02 Cristian Ortiz , Carlos Varea

For a complete noncompact connected Riemannian manifold with bounded geometry, we prove the existence of isoperimetric regions in a larger space obtained by adding finitely many limit manifolds at infinity. As one of many possible…

Differential Geometry · Mathematics 2015-10-30 Stefano Nardulli

We describe how the loop group maps corresponding to special submanifolds associated to integrable systems may be thought of as certain Grassmann submanifolds of infinite dimensional homogeneous spaces. In general, the associated families…

Differential Geometry · Mathematics 2008-04-14 David Brander

In this paper we are interested in understanding the structure of domains of first and second kind, a concept motivated by problems in statistical mechanics. We prove some openness property for domains of first kind with respect to a…

Analysis of PDEs · Mathematics 2020-01-07 Daniele Bartolucci , Andrea Malchiodi

The zero locus of a generic section of a vector bundle over a manifold defines a submanifold. A classical problem in geometry asks to realise a specified submanifold in this way. We study two cases; a point in a generalised flag manifold…

Algebraic Topology · Mathematics 2019-08-21 Shizuo Kaji

We study the local and global intersection cohomology of the intersection of two Schubert varieties in a flag manifold. In this version some new references are added.

Algebraic Geometry · Mathematics 2023-07-25 M. Dyer , G. Lusztig

In this paper I consider all possible properties from commutative algebra for polynomial composites and monoid domains. The aim is full characterization of these structures. I start with the examination of group, ring, modules properties,…

Commutative Algebra · Mathematics 2020-06-29 Lukasz Matysiak

Various simplicial complexes can be associated with a graph. Box complexes form an important families of such simplicial complexes and are especially useful for providing lower bounds on the chromatic number of the graph via some of their…

Combinatorics · Mathematics 2024-01-05 Hamid Reza Daneshpajouh , Frédéric Meunier

We construct integrable models on flag manifold by using the symplectic structure explicitly given in the Bruhat coordinatization of flag manifold. They are non-commutative integrable and some of the conserved quantities are given by the…

High Energy Physics - Theory · Physics 2010-11-01 Myung-Ho Kim , Phillial Oh

Given a Morse function on a manifold whose moduli spaces of gradient flow lines for each action window are compact up to breaking one gets a bidirect system of chain complexes. There are different possibilities to take limits of such a…

Symplectic Geometry · Mathematics 2009-11-11 Kai Cieliebak , Urs Frauenfelder

We study projective structures on a surface having poles of prescribed orders. We obtain a monodromy map from a complex manifold parameterising such structures to the stack of framed $\mathrm{PGL}_2(\mathbb{C})$ local systems on the…

Geometric Topology · Mathematics 2020-07-14 Dylan G. L. Allegretti , Tom Bridgeland

In this paper we consider completed coverings that are branched coverings in the sense of Fox. For completed coverings between PL manifolds we give a characterization of the existence of a monodromy representation and the existence of a…

Geometric Topology · Mathematics 2014-06-26 Martina Aaltonen

Bredon has constructed a 2-dimensional compact cohomology manifold which is not homologically locally connected, with respect to the singular homology. In the present paper we construct infinitely many such examples (which are in addition…

Algebraic Topology · Mathematics 2008-05-14 Umed H. Karimov , Dušan Repovš

A compact K\"ahler manifold is shown to be simply-connected if its `symmetric cotangent algebra' is trivial. Conjecturally, such a manifold should even be rationally connected. The relative version is also shown: a proper surjective…

Algebraic Geometry · Mathematics 2015-11-06 Yohan Brunebarbe , Frédéric Campana

In the first part of this work, we study Dirichlet-Voronoi domains for discrete isometry groups of Riemannian manifolds, in view of constructing cell structures on homogeneous (complete, real) flag manifolds, equivariant with respect to the…

Differential Geometry · Mathematics 2025-06-30 Arthur Garnier

We compute K-semistable domains for various examples of log pairs.

Algebraic Geometry · Mathematics 2023-11-22 Chuyu Zhou

We present simple examples of finite-dimensional connected homogeneous spaces (they are actually topological manifolds) with nonhomogeneous and nonrigid factors. In particular, we give an elementary solution of an old problem in general…

Geometric Topology · Mathematics 2012-03-21 M. Cárdenas , F. F. Lasheras , A. Quintero , D. Repovš

This paper provides a characterization of homogeneous curves on a geometric flag manifold which are geodesic with respect to any invariant metric. We call such curves homogeneous equigeodesics. We also characterize homogeneous equigeodesics…

Differential Geometry · Mathematics 2009-07-13 Nir Cohen , Lino Grama , Caio J. C. Negreiros

We construct an injective map from the set of holomorphic equivalence classes of neighborhoods $M$ of a compact complex manifold $C$ into ${\mathbb C}^m$ for some $m<\infty$ when $(TM)|_C$ is fixed and the normal bundle of $C$ in $M$ is…

Complex Variables · Mathematics 2022-09-26 Xianghong Gong , Laurent Stolovitch

In this article, we study convex affine domains which can cover a compact affine manifold. For this purpose, we first show that every strictly convex quasi-homogeneous projective domain has at least $C^1$ boundary and it is an ellipsoid if…

Geometric Topology · Mathematics 2007-05-23 Kyeonghee Jo
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