arXiv research

Poisson algebra defined for curves on bordered surfaces, matching skein algebra.

Incomplete pressure metric on bordered surface Teichmüller space proved.

The paper proves rigidity of bordered polyhedral surfaces using variational principles.

The paper solves fractional combinatorial flows for prescribed hyperbolic bordered surfaces.

This paper extends the decorated Teichmüller theory developed before for punctured surfaces to the setting of ``bordered'' surfaces, i.e., surfaces with boundary, and there is non-trivial new structure discovered. The main new result identifies the arc complex of a bordered surface up to proper homotopy equivalence wit…

Study how convex structures on surfaces change.

The paper uses bordered Floer homology to detect incompressible surfaces and tangles.

We try to present an estimate relating the first Dirichlet and Neumann eigenvalues of a compact bordered Riemannian surface.

We define a sutured cobordism category of surfaces with boundary and 3-manifolds with corners. In this category a sutured 3-manifold is regarded as a morphism from the empty surface to itself. In the process we define a new class of geometric objects, called bordered sutured manifolds, that generalize both sutured 3-ma…

Classifies positive integral friezes on surfaces.

We prove that every bordered Riemann surface admits a complete proper holomorphic immersion into a ball of C^2, and a complete proper holomorphic embedding into a ball of C^3.

Constructs a combinatorial model for bordered Riemann surfaces with a compactification.

In this paper we find approximate solutions of certain Riemann-Hilbert boundary value problems for minimal surfaces in $\mathbb{R}^n$ and null holomorphic curves in $\mathbb{C}^n$ for any $n\ge 3$. With this tool in hand we construct complete conformally immersed minimal surfaces in $\mathbb{R}^n$ which are normalized …

Classifies cyclic actions on bordered surfaces up to topological conjugation.

Paper studies flow on hyperbolic surfaces to match boundary lengths.

Maximizing symmetry in bordered surfaces embedded in 3-sphere.

Study measures volume of foliations on surfaces, finding integrability range.

Study of harmonic maps from degenerating surfaces with free boundary.

Maximizes symmetry of surfaces embedded in 3D space.

We outline an interpretation of Heegaard-Floer homology of 3-manifolds (closed or with boundary) in terms of the symplectic topology of symmetric products of Riemann surfaces, as suggested by recent work of Tim Perutz and Yanki Lekili. In particular we discuss the connection between the Fukaya category of the symmetric…

Study volumes of Klein surfaces, extending Mirzakhani's recursion.

Let S be a bordered orientable Klein surface and p a prime. Assume that f is an order p automorphism of S. In this work we obtain the conditions on the topological type of (S,f) to be conformally equivalent to (S',f') where S' is a bordered orientable Klein surface embedded in the Euclidean space and f' is the restrict…

Bordered Heegaard Floer homology is a three-manifold invariant which associates to a surface F an algebra A(F) and to a three-manifold Y with boundary identified with F a module over A(F). In this paper, we establish naturality properties of this invariant. Changing the diffeomorphism between F and the boundary of Y te…

Voros symbols used in WKB analysis are shown to be coordinates on a surface.

Derives equilibrium law for Plateau borders in wet soap films and foams.

Bordered Heegaard Floer homology is an invariant for 3-manifolds, which associates to a surface F an algebra A(F), and to a 3-manifold Y with boundary, together with an orientation-preserving diffeomorphism from F to the boundary of Y, a module over A(F). In a previous paper, we defined relative Z/2 differential gradin…

Paper establishes an isomorphism between Fukaya category and bordered knot Floer homology.

Bordered Heegaard Floer homology is an invariant for 3-manifolds, which associates to a surface F an algebra A(Z), and to a 3-manifold Y with boundary, together with an orientation-preserving diffeomorphism φfrom F to \bdy Y, a module over A(Z). We study the Grothendieck group of modules over A(Z), and define an invari…

We construct a graph complex calculating the integral ho- mology of the bordered mapping class groups. We compute the ho- mology of the bordered mapping class groups of various surfaces. Using the circle action on this graph complex, we build a double complex and a spectral sequence converging to the homology of the un…

Study proves certain algebraic structures are symmetric Frobenius algebras.

Bordered Heegaard Floer homology is an invariant for three-manifolds with boundary. In particular, this invariant associates to a handle decomposition of a surface F a differential graded algebra, and to an arc slide between two handle decompositions, a bimodule over the two algebras. In this paper, we describe these b…

Abstract TQFT for sutured manifolds using Floer homology.

Matrix formulas for super Teichmüller spaces generalize previous work and yield super λ-lengths.

We establish basic properties of cluster algebras associated with oriented bordered surfaces with marked points. In particular, we show that the underlying cluster complex of such a cluster algebra does not depend on the choice of coefficients, describe this complex explicitly in terms of "tagged triangulations" of the…

Strip maps are convex for small surfaces.

The paper proves existence of holomorphic Legendrian curves on complex contact manifolds.

Lipshitz, Ozsváth and Thurston defined a bordered Heegaard Floer invariant CFDA for 3-manifolds with two boundary components, including mapping cylinders for surface diffeomorphisms. We define a related invariant for certain 4-dimensional cobordisms with corners, by associating a morphism F from CFDA(f) to CFDA(g) to e…

We give completely combinatorial proofs of the main results of [3] using polygons. Namely, we prove that the mapping class group of a surface with boundary acts faithfully on a finitely-generated linear category. Along the way we prove some foundational results regarding the relevant objects from bordered Heegaard Floe…

New categories for surfaces link to contact geometry.

The study examines cross-border lending behavior from G7 countries, showing changes in driving factors after the 2008 financial crisis.

The paper models and deforms A-infinity structures for bordered knot algebras.

Combinatorial definition of bordered Floer theory for torus-boundary manifolds.

Involutive bordered Floer homology computes 3-manifold invariants.

Surgery triangles are an important computational tool in Floer homology. Given a connected oriented surface $Σ$, we consider the abelian group $K(Σ)$ generated by bordered 3-manifolds with boundary $Σ$, modulo the relation that the three manifolds involved in any surgery triangle sum to zero. We show that $K(Σ)$ is a f…

Invariant for 3-manifolds with torus boundary defined.

This is a survey of bordered Heegaard Floer homology, an extension of the Heegaard Floer invariant HF-hat to 3-manifolds with boundary. Emphasis is placed on how bordered Heegaard Floer homology can be used for computations.

Adapts complex analytic methods to study non-orientable minimal surfaces.

New model for visual cortex border completion using bicycle wheel motions.