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169,341 papers · 148 categories

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48 results for GL_+(2

Study GL(2)GL(2)-structures on manifolds leading to complex structures.

problem Understanding GL(2)GL(2)-structures and their relation to complex structures.
method Explored GL(2)GL(2)-structures on differential manifolds, proving their relation to almost-complex structures and providing a canonical connection.
result Established a twistor-like construction for GL(2)GL(2)-geometry.

We study five dimensional geometries associated with the 5-dimensional irreducible representation of GL(2,R). These are special Weyl geometries in signature (3,2) having the structure group reduced from CO(3,2) to GL(2,R). The reduction is obtained by means of a conformal class of totally symmetric 3-tensors. Among all…

2007-10-01abs ↗pdf ↗

Researchers compute gl2\mathfrak{gl}_2-skein modules for lens spaces.

problem Computing gl2\mathfrak{gl}_2-skein modules for lens spaces.
method Action of gl2\mathfrak{gl}_2-skein algebra on solid torus's gl2\mathfrak{gl}_2-skein module.
result Lens spaces' gl2\mathfrak{gl}_2-skein modules span by specific elements.

Study on GL(2) geometries on complex manifolds, focusing on Kähler-Einstein and Fano manifolds.

problem Characterizing compact complex manifolds with holomorphic GL(2)-geometry.
method Analyzing Kähler-Einstein and Fano manifolds, using GL(2) and SL(2) geometries.
result Only compact Kähler-Einstein manifolds with holomorphic GL(2)-geometry are covered by compact complex tori, three dimensional quadric, or three dimensional Lie ball.

We construct a canonical frame for an arbitrary Gl(2)-structure thus solving the equivalence problem for Gl(2)-structures. Our treatment includes also a problem of contact equivalence of ordinary differential equations and applies to certain classes of vector distributions. Additionally we characterise Gl(2)-structures…

2010-12-03abs ↗pdf ↗

Defines new gl2\mathfrak{gl}_2-foams and their algebras, showing equivalence and applications.

problem Developing new algebraic structures for gl2\mathfrak{gl}_2.
method Introducing parameter-dependent gl2\mathfrak{gl}_2-foams and their associated web and arc algebras.
result All specializations of these algebras are equivalent, with applications in link and tangle invariants.

Study GLS estimator properties in multivariate regression with heteroskedastic and autocorrelated errors.

problem Asymptotic properties of GLS estimator in multivariate regression with specific error structures.
method Derive Wald statistics for linear restrictions and assess their performance.
result Wald statistics remain robust to heteroskedasticity and autocorrelation.

The dualizing module of GL_n(O) varies, affecting cohomology vanishing and nonvanishing.

problem Understanding the dualizing module of GL_n(O) and its impact on cohomology.
method Analyzing the Steinberg module and a variant for GL_n(O), proving vanishing and nonvanishing theorems.
result The dualizing module of GL_n(O) is not always the Steinberg module, but a variant that accounts for orientation.

Classifies GL(2,R) invariant markings over Abelian differential components.

problem Classifying GL(2,R) invariant point markings over Abelian differential components.
method Analyzing hyperelliptic components and their invariant markings.
result Invariant markings arise from specific points or involution exchanges, and can determine holomorphic sections.

This paper studies gl-regular Nijenhuis operators and their properties.

problem Characterizing and understanding gl-regular Nijenhuis operators.
method Analyzing the properties of gl-regular Nijenhuis operators and proving their existence in a coordinate system.
result Discoveries of normal forms for singular points and topological restrictions for gl-regular Nijenhuis operators on closed surfaces.

Four-dimensional GL(2) structures are flat with a specific subgroup transformation.

problem Flatness of GL(2) structures in four dimensions.
method Showed flatness through a coframe transformation involving a subgroup isomorphic to a semidirect product of Heisenberg group and Abelian group.
result The relevant PDE system is integrable with a dispersionless Lax-pair.

The paper constructs compatible Poisson brackets on gl(N).

problem Constructing compatible Poisson brackets on gl(N).
method Using constant tensors and Schouten brackets, the paper explicitly constructs quadratic Poisson brackets compatible with the standard Lie-Poisson bracket.
result Explicit construction of quadratic Poisson brackets compatible with the standard Lie-Poisson bracket on gl(N).

Classifies GL(2,R)-invariant subvarieties with zero Lyapunov exponents.

problem Classifying GL(2,R)-invariant subvarieties with specific properties.
method Classification based on homological dimensions and Lyapunov exponents.
result Explicit exceptions list for GL(2,R)-invariant subvarieties with zero Lyapunov exponents.

Using quantum skew-Howe duality, we study the category Rep(gl(mn))\operatorname{Rep}(\mathfrak{gl}(m|n)) of tensor products of exterior powers of the standard representation of Uq(gl(mn))U_q(\mathfrak{gl}(m|n)), and prove that it is equivalent to a category of ladder diagrams modulo one extra family of relations. We then construct a ca…

2015-04-28abs ↗pdf ↗

We use the technique of quantum skew Howe duality to investigate the monoidal category of exterior powers of the standard representation of Uq(gl(11))U_q(\mathfrak{gl}(1|1)). This produces a complete diagrammatic description of the category in terms of trivalent graphs, with the usual MOY relations plus one additional family o…

2014-06-20abs ↗pdf ↗

New invariant from Viro's gl(1|1) polynomial distinguishes lens spaces.

problem Constructing a 3-manifold invariant from Viro's gl(1|1) polynomial.
method Following Costantino, Geer, and Patureau-Mirand's method in relative G-modular categories.
result The invariant can distinguish homotopy equivalent lens spaces.

We introduce a construction of the differential calculus on the quantum supergroup GLp,q(11)_{p,q}(1| 1). We obtain two differential calculi, respectively, associated with the left and right Cartan-Maurer one-forms. We also obtain the quantum superalgebra of GLp,q(11)_{p,q}(1| 1). Although all of the structures we obtain are der…

2001-12-06abs ↗pdf ↗

GL-LowPopArt improves minimax-optimal estimation for trace regression.

problem Minimizing estimation error in generalized low-rank trace regression.
method Two-stage approach: nuclear norm regularization followed by matrix Catoni estimation.
result Achieves instance-wise optimal error bounds up to condition number.

State sums for quantum link invariants from a specific representation.

problem Calculating quantum link invariants from a specific representation of U_q(gl_{N|M}).
method Using state sums and representation theory of U_q(gl_{N|M}).
result Explicit relation with Kashaev invariants for the N-th exterior power of the standard representation.

We find generators for the full rational loop group of GL(n,C) as well as for the subgroup consisting of loops that satisfy the reality condition with respect to the noncompact real form GL(n,R). We calculate the dressing action of some of those generators on the positive loop group, and apply this to the ZS-AKNS flows…

2009-10-09abs ↗pdf ↗