Research
On-device research index

arXiv research

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.

168,742 papers · 148 categories

Trend · papers per month

80160239319 · Jun 202019922001200920172026
48 results for theta term

The Theta invariant is the simplest 3-manifold invariant defined with configuration space integrals. It is actually an invariant of rational homology spheres equipped with a combing over the complement of a point. It can be computed as the algebraic intersection of three propagators associated to a given combing X in t…

2012-09-14abs ↗pdf ↗

Determinants of theta curves and symmetric graphs are studied.

problem Understanding the determinants of theta curves and symmetric graphs.
method Combinatorial approach using Kirchhoff's Matrix Tree Theorem and spanning tree enumeration.
result The determinant of a simple theta curve is the product of the determinants of its constituent knots.

We prove a folklore theorem of W. Thurston which provides necessary and sufficient conditions for primality of a certain class of theta-curves. Namely, a theta-curve in the 3-sphere with an unknotted constituent knot U is prime if and only if lifting the third arc of the theta-curve to the double branched cover over U …

2015-09-25abs ↗pdf ↗

New spin on Hurwitz theory connects to Gromov-Witten theory and topological recursion.

problem Counting ramified covers with sign from theta characteristics.
method Using polynomiality properties and spectral curves, proving equivalence to ELSV formula.
result Spin Hurwitz numbers are computed via ELSV formula involving Chiodo class.

The Kinoshita graph is the most famous example of a Brunnian theta graph, a nontrivial spatial theta graph with the property that removing any edge yields an unknot. We produce a new family of diagrams of spatial theta graphs with the property that removing any edge results in the unknot. The family is parameterized by…

2015-08-12abs ↗pdf ↗

The tail of the colored Jones polynomial of an alternating link is a qq-series invariant whose first nn terms coincide with the first nn terms of the nn-th colored Jones polynomial. Recently, it has been shown that the tail of the colored Jones polynomial of torus knots give rise to Ramanujan type identities. In th…

2015-12-01abs ↗pdf ↗

In this article we give necessary and sufficient conditions for two triples of integers to be realized as the Thurston-Bennequin number and the rotation number of a Legendrian theta-graph with all cycles unknotted. We show that these invariants are not enough to determine the Legendrian class of a topologically planar …

2013-03-08abs ↗pdf ↗

Proves existence of flat connection on theta functions for G-bundles.

problem Existence of flat connections on nonabelian theta functions for G-bundles.
method Proves existence of a flat projective connection on nonabelian theta functions on moduli space of parabolic G-bundles.
result Existence of a flat projective connection on nonabelian theta functions for parabolic G-bundles.

The normalized Yamada polynomial is a polynomial invariant in variable A for theta-curves. In this work, we show that the coefficients of the power series obtained from this polynomial by the substitution A=e^x=1+x+x^2/2+x^3/6+... are finite-type invariants for theta-curves although the coefficients of original polynom…

2001-04-18abs ↗pdf ↗

We prove an optimal systolic inequality for nonpositively curved Dyck's surfaces. The extremal surface is flat with eight conical singularities, six of angle theta and two of angle 9pi - theta, for a suitable theta with cos(theta) in Q(sqrt{19}). Relying on some delicate capacity estimates, we also show that the extrem…

2012-05-01abs ↗pdf ↗

We determine the abelianization of the symmetric mapping class group of a double unbranched cover using the Riemann theta constant, Schottky theta constant, and the theta multiplier. We also give lower bounds of the abelianizations of some finite index subgroups of the mapping class group.

2007-05-15abs ↗pdf ↗

New indefinite false theta functions match homological blocks for a specific 3-manifold.

problem Constructing homological blocks for certain 3-manifolds.
method Developing indefinite false theta functions and proving their equivalence to homological blocks.
result Indefinite false theta functions match homological blocks for the Poincaré homology sphere.

Study shows how SL2\operatorname{SL}_2 Hitchin connection at level four behaves.

problem Understanding the behavior of SL2\operatorname{SL}_2 Hitchin connection at level four.
method Using Mumford-Welters connections and equivariant conformal embeddings, the connection's monodromy is shown to be finite.
result The monodromy of the SL2\operatorname{SL}_2 Hitchin connection at level four is finite.

New formula and properties of inverted Habiro series derived from GM series.

problem Understanding and manipulating knot invariants using series expansions.
method Developed a new formula for the inverted Habiro series (IHS) in terms of GM series and theta functions. Proved a multiplication formula for IHS.
result Established a natural ring structure for IHS and studied its residues, applying them to Dehn surgery formulas.

The paper constructs a canonical connection on bundles over Riemann surfaces and relates it to the theta divisor.

problem Investigating connections on Riemann surface bundles and their geometric properties.
method Holomorphic connections and symplectic geometry on moduli spaces.
result A symplectic structure-preserving isomorphism between moduli spaces of connections and holomorphic connections on theta divisors.

We construct an analogue of the classical theta-function on an Abelian variety for closed 4-dimensional symplectic manifolds which are T^2-bundles over T^2 with the zero Euler class. We use our theta-functions for a canonical symplectic embedding of these manifolds into complex projective spaces (an analogue of the Lef…

2011-10-11abs ↗pdf ↗

Monopole Floer homology connects 3-manifold invariants to Riemann surface geometry.

problem Relating 3-manifold invariants to Riemann surface geometry.
method Connecting monopole Floer homology to theta characteristics and spin structures.
result Monopole Floer homology groups of mapping tori are determined by automorphisms of Riemann surfaces.

The Kodaira--Thurston M manifold is a compact, 4-dimensional nilmanifold which is symplectic and complex but not Kaehler. We describe a construction of theta-functions associated to M which parallels the classical theory of theta-functions associated to the torus (from the point of view of representation theory and geo…

2007-12-24abs ↗pdf ↗

The generalized volume conjecture and the AJ conjecture (a.k.a. the quantum volume conjecture) are extended to $U_q(\fraksl_2)$ colored quantum invariants of the theta and tetrahedron graph. The $\SL(2,\bC)$ character variety of the fundamental group of the complement of a trivalent graph with EE edges in S3S^3 is a L…

2014-04-21abs ↗pdf ↗

New techniques prove quantum modularity for various functions.

problem Proving quantum modularity of false theta functions and related series.
method Developed techniques including Poisson summation formula and modular series framework.
result Unified approach to proving quantum modularity for various functions.

Theta graph diffeomorphism shows nontrivial mapping class of 4-sphere.

problem Identifying nontrivial elements in the smooth mapping class group of 4-sphere.
method Diagrammatic calculus for smooth mapping class group of 4-sphere, Watanabe's clasper surgery construction.
result Theta graph diffeomorphism is isotopic to a nontrivial element of (1,2)-subgroup.

We study learning in a noisy bisection model: specifically, Bayesian algorithms to learn a target value V given access only to noisy realizations of whether V is less than or greater than a threshold theta. At step t = 0, 1, 2, ..., the learner sets threshold theta t and observes a noisy realization of sign(V - theta t…

2012-02-14abs ↗pdf ↗