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48 results for twisted differential calculus

Construct noncommutative deformations of algebraic submanifolds in R^n.

problem Deforming algebraic submanifolds in noncommutative geometry.
method Using twisted differential geometry and Drinfel'd twists, constructing noncommutative deformations of algebraic submanifolds.
result Explicitly worked out deformations of quadrics in R^3.

The paper introduces a method to deform submanifolds in Euclidean space using Drinfel'd twists.

problem Constructing noncommutative deformations of submanifolds in Euclidean space.
method Using Drinfel'd twist deformation of differential geometry, the paper proposes a general procedure to construct noncommutative deformations of an embedded submanifold.
result The method allows for consistent projection of connections and can be applied to various submanifolds like cylinders and hyperboloids.

Develops combinatorial theory of vector bundles on simplicial complexes.

problem Creating a discrete theory for vector bundles and connections on simplicial complexes.
method Introduces discrete exterior covariant derivative and applies it to various geometric objects.
result Flat discrete connections yield a cochain complex computing twisted de Rham cohomology.

New algebraic formalism for differential calculus in Diolic algebras.

problem Studying differential calculus in vector bundles.
method Introducing functors of differential calculus over arbitrary graded commutative algebras (DCGCA) and applying this to Diolic algebras.
result Recovery of well-known objects and notions from ordinary differential, symplectic, and Poisson geometry, with unique aspects.

We explain that general differential calculus and Lie theory have a common foundation: Lie Calculus is differential calculus, seen from the point of view of Lie theory, by making use of the groupoid concept as link between them. Higher order theory naturally involves higher algebra (n-fold groupoids).(conceptual, topol…

2017-02-27abs ↗pdf ↗

New insights into Khovanov polynomials using tangle calculus.

problem Understanding the structure and evolution of Khovanov polynomials for long braids.
method Application of tangle calculus and evolution theory to Khovanov polynomials, focusing on jumps and thickness.
result Jumps in evolution are less frequent than expected, with most contributions being non-jumping.

We claim that the recently discovered universal-matrix precursor for the FF functions, which define the differential expansion of colored polynomials for twist and double braid knots, can be extended from rectangular to non-rectangular representations. This case is far more interesting, because it involves multiplicit…

2019-03-01abs ↗pdf ↗

Simplified calculus for manifold operators, proving index theorems.

problem Developing calculus for manifold operators and proving index theorems.
method Introducing a simplified pseudo-differential calculus for zero-order operators on manifolds with a tangent Lie structure.
result Proving index theorems for `h-elliptic' operators on manifolds with a tangent Lie structure.

We show that by performing the Gluck twist along the 2-knot Kpq2K^2_{pq} derived from two ribbon presentations of the ribbon 1-knot K(p,q)K(p,q) we get the standard 4-sphere S4S^4. In the proof we apply Kirby calculus.

2011-03-29abs ↗pdf ↗

In this paper we construct the Differential calculus on the Hopf Group Coalgebra introduced by Turaev [10]. We proved that the concepts introduced by S.L.Woronowicz in constructing Differential calculus on Hopf Compact Matrix Pseudogroups (Quantum Groups)[7] can be adapted to serve again in our construction.

2005-07-25abs ↗pdf ↗

Differential calculus on metric spaces is contained in the algebraic study of normed groupoids with δδ-structures. Algebraic study of normed groups endowed with dilatation structures is contained in the differential calculus on metric spaces. Thus all algebraic properties of the small world of normed groups with dilat…

2009-11-06abs ↗pdf ↗

Secondary Calculus formalizes PDEs using cohomology, simplifying their study.

problem Formalizing and simplifying the study of partial differential equations (PDEs).
method Using cohomology of diffieties to formalize PDEs and their properties.
result Differential calculus on PDE solution spaces is homotopy calculus on horizontal De Rham algebras of diffieties.

We study Kuperberg invariants for sutured manifolds in the case of a semidirect product of an involutory Hopf superalgebra HH with its automorphism group Aut(H)\text{Aut}(H). These are topological invariants of balanced sutured 3-manifolds endowed with a homomorphism of the fundamental group into Aut(H)\text{Aut}(H) and possi…

2019-11-07abs ↗pdf ↗

We introduce a noncommutative differential calculus on the two-parameter hh-superplane via a contraction of the (p,q)-superplane. We manifestly show that the differential calculus is covariant under GLh1,h2(11)GL_{h_1,h_2}(1| 1) transformations. We also give a two-parameter deformation of the (1+1)-dimensional phase space alge…

2001-12-13abs ↗pdf ↗

New calculus framework for vector bundles with metrics.

problem Developing calculus for vector bundles with fiber metrics.
method Adapting differential calculus to graded commutative algebras and focusing on diole and triole algebras.
result Triole algebra provides a suitable environment for vector bundle calculus with fiber metrics.

A gauged bi-differential calculus over an associative (and not necessarily commutative) algebra A is an N-graded left A-module with two covariant derivatives acting on it which, as a consequence of certain (e.g., nonlinear differential) equations, are flat and anticommute. As a consequence, there is an iterative constr…

1999-08-17abs ↗pdf ↗

Following the programme set out in Part I of this work, we develop a conceptual higher order differential calculus. The '' local linear algebra '' defined in Part I is generalized by '' higher order local linear algebra ''. The underlying combinatorial object of such higher algebra is the natural n-dimensional hyper-cu…

2015-10-12abs ↗pdf ↗

Basic elements of integral calculus over algebras of iterated differential forms, are presented. In particular, defining complexes for modules of integral forms are described and the corresponding berezinians and complexes of integral forms are computed. Various applications and the integral calculus over the algebra $…

2006-10-30abs ↗pdf ↗

Differential Calculus is a staple of the college mathematics major's diet. Eventually one becomes tired of the same routine, and wishes for a more diverse meal. The college math major may seek to generalize applications of the derivative that involve functions of more than one variable, and thus enjoy a course on Multi…

2009-09-30abs ↗pdf ↗

Any discrete differential manifold MM (finite set endowed with an algebraic differential calculus) can be represented by appropriate polyhedron P(M){\cal P}(M). This representation demonstrates the adequacy of the calculus of discrete differential manifolds and links this approach with that based on finitary substitutes…

1996-02-27abs ↗pdf ↗

Constructs differential models for twisted Spin^c-bordism and its dual, defining a new anomaly map.

problem Modeling and understanding twisted Spin^c-bordism and its dual.
method Geometric construction using bundle gerbes, gerbe modules, and eta-invariants.
result Definition of a twisted anomaly map from differential twisted K-theory to differential Anderson dual of twisted Spin^c-bordism.

We consider differential operators between sections of arbitrary powers of the determinant line bundle over a contact manifold. We extend the standard notions of the Heisenberg calculus: noncommutative symbolic calculus, the principal symbol, and the contact order to such differential operators. Our first main result i…

2012-05-30abs ↗pdf ↗

Extends exterior diff. sys. to Lie algebroids with examples.

problem Invariant inverse problem of the calculus of variations
method Extends exterior differential systems to Lie algebroids, defines integral manifolds.
result Defines integral manifolds for exterior diff. systems on Lie algebroids.

This is the first in a series of papers constructing geometric models of twisted differential K-theory. In this paper we construct a model of even twisted differential K-theory when the underlying topological twist represents a torsion class. By differential twists we will mean smooth U(1)-gerbes with connection, and w…

2016-02-06abs ↗pdf ↗

Develops global pseudo-differential calculus on homogeneous vector bundles.

problem Global theory of subelliptic pseudo-differential operators on homogeneous vector bundles.
method Global symbolic calculus, complex functional calculus, Hörmander system of vector-fields.
result Global pseudo-differential calculus on homogeneous vector bundles.

A new discrete calculus for bundle-valued forms is proposed and validated.

problem Discretization of exterior calculus for bundle-valued forms.
method Discretization of Cartan's exterior calculus for differential forms with values in vector bundles.
result The proposed discrete operator mimics the continuous exterior covariant derivative and ensures numerical convergence.

We examine the N-Koszul calculus for the N-symmetric algebras. The case N=2 corresponds to the Elie Cartan calculus. We conjecture that, as in the case N=2, the N-Cartan calculus extends to manifolds when N>2, which would provide a new type of noncommutative differential geometry.

2017-08-21abs ↗pdf ↗

Survey revisits vector calculus results using exterior derivative and provides a new formulation of Stokes' theorem.

problem Classical results in vector calculus and analysis.
method Generalised perspective on the exterior derivative and a higher-dimensional Mean Value Theorem.
result Provides a natural formulation of Stokes' theorem and a practical algorithm for exterior differentiation.

Global calculus for manifolds with boundary, solving evolution problems.

problem Global solvability of evolution problems on manifolds with boundary.
method Established global functional calculus and Gårding inequality for pseudo-differential operators without local coordinates.
result Global solvability for a class of evolution problems.