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A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

168,695 papers · 148 categories

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48 results for map construction

New subgroups of mapping class groups constructed for infinite-type surfaces.

problem Constructing new subgroups of mapping class groups for infinite-type surfaces.
method Utilization of special homeomorphisms called shift maps and multipush maps.
result Countably (and uncountably in certain cases) many non-conjugate embeddings of subgroups into mapping class groups.

This paper constructs real algebraic maps that are topologically special generic maps.

problem Constructing smooth maps in differential topology and real algebraic geometry.
method Constructs real algebraic maps that are topologically special generic maps.
result Real algebraic maps are topologically special generic maps.

{\it Fold maps} are fundamental tools in generalizing the theory of Morse functions and its application to studies of geometric properties of manifolds. One of the fundamental and important problems in the theory of fold maps is to construct explicit fold maps, which are often difficult. In this paper, we construct new…

2013-07-27abs ↗pdf ↗

The study constructs equivariant harmonic maps into symmetric spaces with applications to Willmore surfaces.

problem Constructing harmonic maps into symmetric spaces.
method Equivariant primitive harmonic maps construction.
result Examples of S1S^1-equivariant Willmore Moebius strips in S3S^3.

Construct pseudo-Anosovs from expanding interval maps, reconciling Thurston's construction.

problem Constructing pseudo-Anosov homeomorphisms from expanding interval maps.
method Classifying circumstances for constructing pseudo-Anosovs from a specific subclass of generalized pseudo-Anosovs.
result Produces pseudo-Anosovs on surfaces of genus gg with algebraically primitive translation structures and Salem dilatations.

Propose a new 3d quantum trace map that agrees with Garoufalidis and Yu's construction and extends to certain manifolds with ideal triangulated boundaries.

problem Relationship between two constructions of 3d quantum trace maps.
method Propose a new 3d quantum trace map.
result Proposed 3d quantum trace map agrees with Garoufalidis and Yu's construction and extends to certain manifolds with ideal triangulated boundaries.

In this paper, we construct round fold maps or stable fold maps with concentric singular value sets introduced by the author on smooth bundles over spheres or bundles over more general manifolds. The class of round fold maps includes special generic maps on spheres and such maps have been constructed on smooth bundles …

2013-05-08abs ↗pdf ↗

The paper constructs simplicial maps of any degree on spheres, solving a long-standing problem.

problem Constructing simplicial maps of any degree on spheres.
method Using connected sums and facet orientations, the paper develops a method to construct maps of any prescribed degree.
result The paper answers a question posed by Ryabichev and constructs simplicial maps of degree dd for large dd.

Develops methods to construct harmonic and wave maps into variable-curvature surfaces.

problem Limited explicit constructions for harmonic and wave maps in variable-curvature settings.
method Reduction framework for pseudo-Riemannian surfaces, geometric ansatz, first-order ODEs.
result Constructs explicit harmonic and wave maps into ellipsoids, hyperboloids, and Schwarzschild exterior.

We construct the first known examples of nontrivial, normal, all pseudo-Anosov subgroups of mapping class groups of surfaces. Specifically, we construct such subgroups for the closed genus two surface and for the sphere with five or more punctures. Using the branched covering of the genus two surface over the sphere an…

1999-06-20abs ↗pdf ↗

This thesis extends Hamiltonian actions to multisymplectic geometry, classifying actions on spheres and constructing homotopy comomentum maps.

problem Extending Hamiltonian actions to multisymplectic geometry.
method Explicit constructions and concrete examples of homotopy comomentum maps.
result Complete classification of compact group actions on multisymplectic spheres and explicit construction of homotopy comomentum maps.

We show that Galois conjugates of stretch factors of pseudo-Anosov mapping classes arising from Penner's construction lie off the unit circle. As a consequence, we show that for all but a few exceptional surfaces, there are examples of pseudo-Anosov mapping classes so that no power of them arises from Penner's construc…

2014-10-26abs ↗pdf ↗

Koschorke introduced a map from the space of closed nn-component links to the ordered configuration space of nn-tuples of points in R3\mathbb{R}^3, and conjectured that this map separates homotopy links. The purpose of this paper is to construct an analogous map for string links, and to prove (1) this map in fact sep…

2015-04-13abs ↗pdf ↗

Researchers construct an index map for contact manifolds using K-theory.

problem Constructing an index for maximally hypoelliptic operators on contact manifolds.
method Using Higson's construction for symbol class in K-theory, they derive a series of maps whose induced map in K-theory is the Heisenberg Atiyah-Singer index map.
result Explicit construction of a series of maps leading to the Heisenberg Atiyah-Singer index map.

The study restricts manifolds with certain explicit SGL maps and constructs them.

problem Restrictions on manifolds admitting specific SGL maps.
method Generalization of Morse functions and canonical projections to construct SGL maps.
result Manifolds admitting certain explicit SGL maps are strongly topologically restricted.

Quantum Frobenius map for SL3SL_3 skein modules constructed and described.

problem Constructing a quantum Frobenius map for SL3SL_3 skein modules.
method Using threading polynomials and the Frobenius map of Parshall-Wang for quantum group Oq(SL3).\mathcal{O}_q(SL_3).
result Described the quantum Frobenius map for SL3SL_3 skein modules.

Semi-Equivelar maps are generalizations of Archimedean Solids (as are equivelar maps of the Platonic solids) to the surfaces other than 22-Sphere. We classify some semi equivelar maps on surface of Euler characteristic -1 and show that none of these are vertex transitive. We establish existence of 12-covered triangula…

2011-01-04abs ↗pdf ↗

We construct the geometric Baum-Connes assembly map for twisted Lie groupoids, that means for Lie groupoids together with a given groupoid equivariant PU(H)PU(H)-principle bundle. The construction is based on the use of geometric deformation groupoids, these objects allow in particular to give a geometric construction of …

2014-02-14abs ↗pdf ↗

We construct new monomorphisms between mapping class groups of surfaces. The first family of examples injects the mapping class group of a closed surface into that of a different closed surface. The second family of examples are defined on mapping class groups of once-punctured surfaces and have quite curious behaviour…

2008-11-05abs ↗pdf ↗

The paper explores continuous limits of pentagram maps and their relation to KdV equations.

problem Understanding the continuous limits of pentagram maps and their associated KdV equations.
method Quantum calculus and geometric constructions to derive continuous limits and Lax representations.
result Continuous limits of pentagram maps yield specific KdV equations, providing a geometric interpretation.

Researchers extend period maps for Calabi-Yau types using modified Kato-Nakayama-Usui construction.

problem Existence of weak fans for non-classical period maps of weight 3 Calabi-Yau type.
method Modified Kato-Nakayama-Usui construction for period maps of weight 3 Calabi-Yau type.
result Existence of weak fans for a large class of period maps of weight 3 Calabi-Yau type.

Given a non-compact Riemannian manifold M and a submanifold N of codimension q, we will construct under certain assumptions on both M and N a wrong way map in uniformly finite homology. Using an equivariant version of the construction and applying it to universal covers, we will construct wrong way maps in homology of …

2016-02-10abs ↗pdf ↗

We define a generalization of Coxeter graphs and an associated Coxeter system and Coxeter mapping class. These can be used to construct periodic Coxeter mapping classes on surfaces with arbitrarily large genus, preserving lots of symmetries. The periodic mapping classes can in turn be used to construct sequences of pse…

2011-10-05abs ↗pdf ↗

Biharmonic maps between surfaces are studied in this paper. We compute the bitension field of a map between surfaces with conformal metrics in complex coordinates. As applications, we show that a linear map from Euclidean plane into (R2,σ2dwdwˉ)(\mathbb{R}^2, σ^2dwd\bar w) is always biharmonic if the conformal factor σσ is bi-a…

2010-08-04abs ↗pdf ↗