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48 results for Kontsevich flow

Graph morphism maps Poisson cocycles to symmetries, revealing factorization through Jacobi identity.

problem Mapping graph cocycles to symmetries of Poisson structures.
method Kontsevich graph orientation morphism and differential consequences of Jacobi identity.
result Existence of factorization through differential consequences of Jacobi identity.

This research connects combinatorial Teichmüller space geometry to Weil-Petersson geometry.

problem Understanding the geometry of combinatorial Teichmüller space.
method Developed a parallel between combinatorial Teichmüller space and Weil-Petersson geometry, using measured foliations and Fenchel-Nielsen coordinates.
result Established a geometric recursion and topological recursion for mapping class group invariants.

A 2008 general overview on Weil-Petersson geometry is offered. A preliminary plan for the subsequent CBMS lectures at Central Connecticut State University is included. Mirzakhani's solution of Witten-Kontsevich is not included - this work essentially requires its own lectures. Lectures on Mirzakhani's Witten-Kontsevich…

2012-02-18abs ↗pdf ↗

We introduce a "minimal" Kontsevich integral that generates the original Kontsevich integral while at the same time producing ribbons whose boundaries are the braids on which the minimal Kontsevich integral is evaluated. We generalize the definition of the Kontsevich integral to that of graphs in R^3 and study the beha…

2012-03-20abs ↗pdf ↗

We analyse the asymptotical growth of Vassiliev invariants on non-periodic flow lines of ergodic vector fields on domains of R3\R^3. More precisely, we show that the asymptotics of Vassiliev invariants is completely determined by the helicity of the vector field. As an application, we determine the asymptotic Alexander…

2008-10-21abs ↗pdf ↗

The paper studies the n-loop Kontsevich invariant of knots with same Alexander polynomial.

problem Understanding the n-loop Kontsevich invariant for knots with identical Alexander polynomials.
method Analyzes the subspace generated by the n-loop Kontsevich invariant of knots with genus ≤ g and same Alexander polynomial.
result For n ≥ 2, the subspace is finite-dimensional.

The study finds arithmetic groups often in square-tiled surface monodromies.

problem Understanding arithmetic properties of square-tiled surfaces.
method Analyzing variations of Hodge structures and Kontsevich-Zorich monodromies.
result Arithmetic groups are frequent in low genus square-tiled surfaces.

New topological realization of Kontsevich graph complex for large dimensions.

problem Understanding the rational homotopy groups of Diff partial(D2k).
method Construction of a chain map from Kontsevich graph complex to rational singular chain complex.
result New elements in rational homotopy groups of BDiff partial(D2k) determined by cycles in graph complex.

We refine a Le and Murakami uniqueness theorem for the Kontsevich Integral in order to specify the relationship between the two (possibly equal) main universal link invariants: the Kontsevich Integral and the perturbative expression of the Chern-Simons theory. As a corollary, we prove that the Altschuler and Freidel an…

2000-04-14abs ↗pdf ↗

Kontsevich's classes distinguish smooth structures on fiber bundles.

problem Distinguishing smooth structures on fiber bundles.
method Using Kontsevich's characteristic classes and real blow-up construction.
result Kontsevich's classes are determined by the topology of the 2-point configuration space bundle.

The paper studies the index of a specific monodromy for origamis in a particular stratum.

problem Determining the index of a Kontsevich-Zorich monodromy for origamis in H(2)\mathcal{H}(2).
method Analyzing the action of the Veech group on the non-tautological part of the homology.
result The index of the Kontsevich-Zorich monodromy is either 1 or 3 for origamis in H(2)\mathcal{H}(2).

This paper is an exposition of heuristics related to Witten's functional integral, relating it to Vassiliev invariants and to the Kontsevich integrals that can be used to produce Vassiliev invariants of knots and links.In particular, we give a simplified version of the appearance of the Kontsevich integrals in the pert…

1998-11-23abs ↗pdf ↗

This is an overview article on the Kontsevich integral written for the Encyclopedia of Mathematical Physics, to be published by Elsevier.

2005-01-04abs ↗pdf ↗

We describe all the situations in which the Kontsevich-Zorich cocycle has zero Lyapunov exponents. Confirming a conjecture of Forni, Matheus, and Zorich, this only occurs when the cocycle satisfies additional geometric constraints. We also describe the real Lie groups which can appear in the monodromy of the Kontsevich…

2014-10-08abs ↗pdf ↗

We review quantum field theory approach to the knot theory. Using holomorphic gauge we obtain the Kontsevich integral. It is explained how to calculate Vassiliev invariants and coefficients in Kontsevich integral in a combinatorial way which can be programmed on a computer. We discuss experimental results and temporal …

2011-12-22abs ↗pdf ↗

Explicit computation of Kontsevich weights for symplectic Poisson structures.

problem Computing weights of Kontsevich graphs in symplectic Poisson structures.
method Detailed explicit computation using hypergeometric functions and simpler formulas.
result Explicit expressions for curvature weights and their simplification in cotangent bundles.

Study on string links invariant under associator choice and Grothendieck--Teichmüller group action.

problem Independence of Kontsevich invariant under associator choice for 2-component string links.
method Investigation of Kontsevich invariant for 2-component string links and action of Grothendieck--Teichmüller group.
result Non-trivial action of Grothendieck--Teichmüller group on algebra of 2-component string links.

We study the rational Kontsevich integral of torus knots. We construct explicitely a series of diagrams made of circles joined together in a tree-like fashion and colored by some special rational functions. We show that this series codes exactly the unwheeled rational Kontsevich integral of torus knots, and that it beh…

2004-04-14abs ↗pdf ↗

New formulas for colored Jones polynomials of double twist knots generalize series and duality.

problem Calculating colored Jones polynomials for double twist knots.
method Using Takata's result and comparing with cyclotomic expansions.
result Generalizes Kontsevich-Zagier series and duality at roots of unity.

We construct an extension of the Kontsevich integral of knots to knotted trivalent graphs, which commutes with orientation switches, edge deletions, edge unzips, and connected sums. In 1997 Murakami and Ohtsuki [MO] first constructed such an extension, building on Drinfel'd's theory of associators. We construct a step …

2008-11-27abs ↗pdf ↗

Study of translation covers of platonic solids reveals monodromy group structures.

problem Understanding monodromy groups of translation covers of platonic solids.
method Computed Zariski closures using generators, constraints, and Lyapunov spectrum analysis.
result Zariski closures of monodromy groups are powers of SL(2, R).

Researchers extend a groupoid approach to calculate Wodzicki residue and Kontsevich-Vishik trace.

problem Calculating Wodzicki residue and Kontsevich-Vishik trace for pseudo-differential operators of any order.
method Groupoid approach to pseudo-differential operators.
result Extension of van Erp and Yuncken's work to operators of any order.

The Kontsevich integral of a knot is a powerful invariant which takes values in an algebra of trivalent graphs with legs. Given a Lie algebra, the Kontsevich integral determines an invariant of knots (the so-called colored Jones function) with values in the symmetric algebra of the Lie algebra. Recently A. Kricker and …

2002-01-08abs ↗pdf ↗

New formulas for knot invariants under specific surgeries.

problem Defining and proving splitting formulas for knot invariants.
method Defined a functorial extension of the Kricker invariant and proved splitting formulas for null Lagrangian-preserving surgery.
result Splitting formulas for the Kricker invariant under null Lagrangian-preserving surgery.

By studying spaces of flow graphs in a closed oriented manifold, we construct operations on its cohomology, parametrized by the homology of the moduli spaces of compact Riemann surfaces with boundary marked points. We show that the operations satisfy the gluing axiom of an open homological conformal field theory. This …

2013-05-02abs ↗pdf ↗

We introduce a matrix representation of a chord on a tangle which leads us to representing tangle chord diagrams as stacks of matrices that we call books. We show that band sum moves, Reidemeister moves as well as orientation changes are implemented on \widetilde{Z}_f - a framed link invariant constructed from the Kont…

2010-10-14abs ↗pdf ↗

In this paper we will prove a super-analogue of a well-known result by Kontsevich which states that the homology of a certain complex which is generated by isomorphism classes of oriented graphs can be calculated as the Lie algebra homology of an infinite-dimensional Lie algebra of symplectic vector fields.

2005-10-18abs ↗pdf ↗