Study of knot invariants using twisted Iwasawa theory.
problem Determining knot properties like genus and fiberedness.
method Introducing twisted Iwasawa invariants for knot representations and covers.
result Iwasawa invariants determine knot properties and their rigidity.
Study topological Iwasawa invariants for 3-sphere links, proving density results.
problem Detect and analyze Iwasawa invariants for 3-sphere links.
method Explicit criteria for detecting Iwasawa invariants, statistical analysis of 2-bridge links.
result Density of 2-bridge links with specific Iwasawa invariants.
Based on the analogy between knots and primes, J. Hillman, D. Matei and M. Morishita defined the Iwasawa invariants for sequences of cyclic covers of links with an analogue of Iwasawa's class number formula of number fields. In this paper, we consider the existence of covers of links with prescribed Iwasawa invariants,…
Study models of Gödel Universe using Lie groups and Iwasawa decomposition.
problem Modeling the Gödel Universe as a Lie group with specific metrics.
method Iwasawa decomposition for semisimple Lie groups, left-invariant Lorentz metric on SL(2,R).
result Isometry between sub-Riemannian Lie groups induced by Iwasawa decomposition.
Study p-torsion growth in covers of 3-manifolds, proving Iwasawa formulas.
problem Investigate p-torsion growth in compatible systems of covers of 3-manifolds. method Establish analogues of Iwasawa's class number formula for branched covers of links.
result Prove Cuoco--Monsky type formula for branched covers of links.
Analogues of Iwasawa invariants in the context of 3-dimensional topology have been studied by M.~Morishita and others. In this paper, following the dictionary of arithmetic topology, we formulate an analogue of Kida's formula on λ-invariants in a p-extension of Zp-fields for 3-manifolds. The proof is gi…
Classifies Ricci soliton subgroups in specific Lie groups.
problem Classifying Ricci soliton subgroups in solvable Lie groups.
method Analyzing codimension one subgroups of solvable Iwasawa groups and related spaces.
result Classifications of Ricci soliton subgroups in various Lie groups.
The paper constructs pseudo-Iwasawa solvmanifolds with Killing spinors.
problem Constructing Killing spinors on pseudo-Riemannian solvmanifolds.
method Using nilsolitons and pseudo-Iwasawa condition, the paper constructs families of pseudo-Iwasawa solvmanifolds with Killing spinors.
result All pseudo-Iwasawa solvmanifolds admitting a Killing spinor belong to a specific family.
For a unitary local system of rank one on a complete hyperbolic threefold of finite volume which has only one cusp, we will compare the order of the Alexander invariant at t=1 and one of Ruelle-Selberg L-function at s=0. Our result may be considered as a geometric analog of the Iwasawa main conjecture in the algebraic …
Kähler submanifolds in Iwasawa manifolds are studied.
problem Characterizing Kähler submanifolds in Iwasawa manifolds.
method Analyzing quotient groups and using complex homogeneity.
result Kähler surfaces in Iwasawa manifolds are either abelian or non-projective isotrivial elliptic.
The paper classifies and describes translators in SL(2,R) under specific symmetry conditions.
problem Classifying translators in SL(2,R) under invariant symmetry groups. method Analyzing translators invariant by one-parameter groups of isometries, using Iwasawa decomposition and Killing vector fields.
result Explicit parametrizations of translators are obtained for some cases.
Study of Alexander polynomials of torus knots and links, showing zeros equidistribute on unit circle.
problem Analyzing asymptotic behavior and distribution of zeros of Alexander polynomials of torus knots.
method Equidistribution analysis, moment sequence, Iwasawa theory, logarithmic Mahler measure.
result Zeros of Alexander polynomials of torus knots and links become equidistributed on the unit circle as p, q → ∞.
Geometrically proves Lie algebras are identified by their Iwasawa subalgebras.
problem Determining semi-simple Lie algebras from their subalgebras.
method Geometry of Einstein solvmanifolds and algebraic procedure.
result Semi-simple Lie algebras are uniquely determined by their Iwasawa subalgebras.
We identify the space of left-invariant oriented complex structures on the complex Heisenberg group, and prove that it has the homotopy type of the disjoint union of a point and a 2-sphere.
This paper classifies Ricci soliton subgroups in a specific type of nilpotent group.
problem Classifying Ricci soliton subgroups in a specific type of nilpotent group.
method Using the properties of nilpotent Iwasawa groups and Lie subgroups.
result Classification of codimension one Lie subgroups of nilpotent Iwasawa groups that are Ricci solitons.
Study on spectral sequence of Iwasawa manifold and its deformations.
problem Properties of Frölicher spectral sequence on Iwasawa manifold and its deformations.
method Determination of successive pages of the Frölicher spectral sequence.
result New examples and counterexamples on spectral sequence properties.
Study of double complexes on Iwasawa manifold yields 3 isomorphism types.
problem Understanding the structure of double complexes on the Iwasawa manifold.
method Used Stelzig and Qi-Khovanov's structure theorem for double complexes.
result Identified and described exactly 3 isomorphism types of double complexes.
Theory developed for p-adic Mahler measure applied to Z-covers of links.
problem Study of Z-covers of rational homology 3-spheres branched over links. method Developed a theory of p-adic Mahler measure and applied it to Z-covers of links. result Obtained a p-adic analogue of the asymptotic formula of the torsion homology growth and a balance formula among coefficients and invariants. Extended metric defined on Siegel-Jacobi space using invariant forms.
problem Defining a metric on the extended Siegel-Jacobi upper half space.
method Matrix embedding, pre-Iwasawa decomposition, invariant forms, sum of squares of forms.
result Invariant metric on the extended Siegel-Jacobi upper half space is derived.
We set up an abstract framework that allows the investigation of Iwasawa decompositions for involutive infinite-dimensional Lie groups modeled on Banach spaces. As an application, we construct Iwasawa decompositions for classical real or complex Banach-Lie groups associated with the Schatten ideals ${\mathfrak S}_p({\m…
The fundamental 2-form of an invariant almost Hermitian structure on a 6-dimensional Lie group is described in terms of an action by SO(4)xU(1) on complex projective 3-space. This leads to a combinatorial description of the classes of almost Hermitian structures on the Iwasawa and other nilmanifolds.
Constructs explicit p-harmonic functions on specific Lie groups.
problem Finding explicit p-harmonic functions on a specific class of Lie groups.
method Constructs explicit p-harmonic functions on rank-one Lie groups of Iwasawa type.
result Proves existence of proper p-harmonic functions on these groups.
Let J1 be the real form of a complex simple Jordan algebra such that the automorphism group is F4(−20). By using some orbit types of F4(−20) on J1, for F4(−20), explicitly, we give the Iwasawa decomposition, the Oshima--Sekiguchi's Kε−Iwasawa decomp…
Study on special metrics and deformations of solvmanifolds.
problem Existence and properties of Kähler metrics on solvmanifolds.
method Investigation of strong Kähler with torsion metrics and balanced metrics on deformations of specific solvmanifolds.
result Non-existence of certain metrics on specific solvmanifolds.
Iwasawa manifold self-duality proven via Albanese map and Hodge theory.
problem Proving self-duality of Iwasawa manifold.
method Deriving Hodge theory for sGG manifolds, constructing Albanese map.
result Iwasawa manifold self-duality proven.
The paper studies p-adic limits of class numbers in Zp-extensions and covers.
problem Understanding p-adic limits of class numbers in Zp-extensions and covers. method Arithmetic topology, explicit formula for p-adic limit of p-power-th cyclic resultants, investigations of knots and elliptic curves. result Established explicit formula for p-adic limit of p-power-th cyclic resultants. We show that all 6-dimensional nilmanifolds admit generalized complex structures. This includes the five classes of nilmanifold which admit no known complex or symplectic structure. Furthermore, we classify all 6-dimensional nilmanifolds according to which of the four types of left-invariant generalized complex structu…
New Einstein metrics found on specific Lie algebras.
problem Finding special Einstein metrics on solvable Lie algebras.
method Concrete procedure to construct Einstein pseudo-Kähler and para-Kähler metrics.
result Existence of Einstein pseudo-Riemannian metrics on specific Lie algebras.
Study new invariants in complex geometry using Bott-Chern hypercohomology.
problem Understanding geometry through Bott-Chern hypercohomology and bimeromorphic invariants.
method Construct new invariants involving sheaf cohomology, establish blow-up formula and canonical morphism.
result Compute invariants for specific complex threefolds like Iwasawa manifolds and quintic threefolds.
Classifies CR submanifolds in complex hyperbolic spaces.
problem Understanding CR submanifolds in complex hyperbolic spaces.
method Classifying orbits of a subgroup of the solvable part of the Iwasawa decomposition.
result Classification of homogeneous CR submanifolds.
New approach to Mirror Symmetry for non-Kähler manifolds, proving Iwasawa manifold is its own mirror.
problem Applying Mirror Symmetry to non-Kähler compact complex manifolds, particularly Iwasawa manifold.
method Developed a new approach to Mirror Symmetry, proving Iwasawa manifold is its own mirror.
result Iwasawa manifold is its own mirror dual, with clear geometric meaning for essential deformations.
We prove that, for some classes of complex nilmanifolds, the Bott-Chern cohomology is completely determined by the Lie algebra associated to the nilmanifold with the induced complex structure. We use these tools to compute the Bott-Chern and Aeppli cohomologies of the Iwasawa manifold and of its small deformations, com…
New method constructs translationally equivariant hyperbolic affine spheres.
problem Constructing translationally equivariant hyperbolic affine spheres.
method Noncompact Iwasawa factorization via DPW method and Weierstrass elliptic functions.
result Every translationally equivariant hyperbolic affine sphere is equiaffinely equivalent to one with a circle, hyperbola, or parabola slice curve.
For a local system on a compact hyperbolic threefold, under a cohomological assumption, we will show that the order of its twisted Alexander polynomial and of the Ruelle L function at s=0 coincide. Moreover we will show that their leading constant are also identical. These results may be considered as a solution of a…
Formula derived for Bott-Chern classes in complex blow-ups.
problem Calculating Bott-Chern classes in blow-ups of complex manifolds.
method Proved blow-up formula for Bott-Chern classes, established Riemann-Roch without denominators.
result Formula for Bott-Chern classes in blow-ups.
Global harmonic maps into SU(1,1) constructed from Smyth potentials using DPW method.
problem Globality of harmonic maps constructed from Smyth potentials in SU(1,1).
method Construct harmonic maps into SU(1,1) using the DPW method, solving a Riemann-Hilbert problem to achieve global Iwasawa factorization.
result Globality of the constructed harmonic maps proved using Bessel functions and asymptotic expansions.
This thesis was inspired by work of M. Cowling, F. De Mari, A. Koranyi and M. Reimann, who studied multicontact structures for the homogeneous manifolds G/P, where G is a semisimple Lie group and P is the minimal parabolic subgroup of G. The multicontact structure here arises naturally by the nilpotent component N of t…
In the first part we define a "BTZ" black hole in anti de Sitter space in any dimension by defining as "singular" the closed orbits of the Iwasawa component of SO(2,n). In the second part, a strict quantization of the black hole by action of group is performed and its Dirac operator is computed. We introduce, in the ap…
In this paper we study the scalar geometries occurring in the dimensional reduction of minimal five-dimensional supergravity to three Euclidean dimensions, and find that these depend on whether one first reduces over space or over time. In both cases the scalar manifold of the reduced theory is described as an eight-di…
Study of deformed Bott-Chern cohomology on complex manifolds.
problem Deformation theory and cohomology of complex manifolds.
method Introduce a double complex structure and study its Bott-Chern cohomology.
result Established a deformation theory for Bott-Chern cohomology and computed deformed cohomology for specific manifolds.
Extends deformation theory to higher-page analogues of manifolds.
problem Deformation theory of higher-page analogues of manifolds.
method Extends essential deformations from Iwasawa manifolds to page-1-∂∂-manifolds.
result Obtains an unobstructedness theorem for page-1-∂∂-manifolds.
We present explicit universal strict deformation quantization formulae for actions of Iwasawa subgroups AN of SU(1,n). This answers a question raised by Rieffel.
Study on existence of balanced metrics on non-Kähler manifolds.
problem Existence of balanced metrics on non-Kähler complex manifolds.
method Analyzes obstructions and constructs examples, focusing on compact quotients of Lie groups.
result Proves non-existence on certain non-Kähler complex parallelizable manifolds and solvmanifolds.
In this article we continue the study of the geometry of k-D'Atri spaces, ≤n−1 (n denotes the dimension of the manifold), began by the second author. It is known that k-D'Atri spaces, k≥1, are related to properties of Jacobi operators Rv along geodesics, since she has shown that ${\…
This article introduces the problem of finding intrinsic torsion varieties associated to G-structures on a fixed parallelizable Riemannian manifold. As an illustration, the intrinsic torsion varieties of orthogonal almost product structures are analysed on the Iwasawa manifold.
We study the relevant structure of so(2,n) which makes the BTZ black hole possible in the anti de Sitter space. We pay a particular attention of the reductive Lie algebra structures and Iwasawa decompositions and the way these structures evolves when one increases the dimension. The singularity is defined as the closed…
The paper constructs Einstein Sasaki metrics on solvable Lie groups.
problem Constructing left-invariant Einstein pseudo-Riemannian Sasaki metrics on solvable Lie groups.
method Characterizing pseudo-Kähler structures and derivations giving rise to Sasaki-Einstein metrics.
result Classification of z-standard Sasaki solvable Lie algebras of dimension ≤7. We factorize harmonic maps with values in a semisimple Lie groups in a product of harmonic maps with values in the components of the Iwasawa decomposition. In particular, we use this factorization to study the harmonic maps from Rn into SL(2,R).