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A power structure over a ring is a method to give sense to expressions of the form $(1+a_1t+a_2t^2+\ldots)^m$, where $a_i$, $i=1, 2,\ldots$, and $m$ are elements of the ring. The (natural) power structure over the Grothendieck ring of…

Algebraic Geometry · Mathematics 2017-05-19 Sabir M. Gusein-Zade , Ignacio Luengo , Alejandro Melle-Hernández

A structure theorem is proved for strongly holonomic modules over a quantum torus (a crossed product of a field with a free abelian group in which the field is central). This can be applied to give a structure theorem for finitely presented…

Representation Theory · Mathematics 2011-12-06 C. J. B. Brookes , J. R. J. Groves

The purpose of this paper is to introduce the notion of mixed twistor structure, a generalization of the notion of mixed Hodge structure. The utility of this notion is to make possible a theory of weights for various things surrounding…

alg-geom · Mathematics 2008-02-03 Carlos Simpson

We will give a geometric description of the nth transversal homotopy monoid of k-dimensional complex projective space, where we stratify by lower dimensional complex projective spaces in the usual way. Transversal homotopy monoids are…

Algebraic Topology · Mathematics 2011-04-08 Conor Smyth

We prove that structured vector bundles whose holonomies lie in GL(N,C), SO(N,C), or Sp(2N,C) have structured inverses. This generalizes a theorem of Simons and Sullivan.

Differential Geometry · Mathematics 2015-04-23 Indranil Biswas , Vamsi Pingali

This paper is about the study of F-transforms based on overlap and grouping maps, residual and co-residual implicator over complete lattice from both constructive and axiomatic approaches. Further, the duality, basic properties, and the…

Rings and Algebras · Mathematics 2023-01-31 Abha Tripathi , S. P. Tiwari , Sutapa Mahato

We prove tight bounds for the $\infty$-norm of the inverse of symmetric, diagonally dominant positive matrices. We also prove a new lower-bound form of Hadamard's inequality for the determinant of diagonally dominant positive matrices and…

Functional Analysis · Mathematics 2015-03-20 Christopher J. Hillar , Shaowei Lin , Andre Wibisono

We investigate algebraic structures that can be placed on vertices of the multiplihedra, a family of polytopes originating in the study of higher categories and homotopy theory. Most compelling among these are two distinct structures of a…

Combinatorics · Mathematics 2009-11-12 Stefan Forcey , Aaron Lauve , Frank Sottile

Motivated by amplitude calculations in string theory we establish basic properties of homotopy invariant iterated integrals on affine curves.

Algebraic Geometry · Mathematics 2019-12-23 Martin Luu , Albert Schwarz

We prove that the loop space of the directed suspension of a directed space is homotopy equivalent to the James construction. In particular, it does not depend on the directed structure of a given directed space.

Algebraic Topology · Mathematics 2016-07-05 Andrzej Weber , Krzysztof Ziemiański

We study the homotopy of the connected sum of a manifold with a projective space, viewed as a typical way to stabilize manifolds. In particular, we show a loop homotopy decomposition of a manifold after stabilization by a projective space,…

Algebraic Topology · Mathematics 2023-08-03 Ruizhi Huang , Stephen Theriault

We study the defect-induced nonlinear transmission of a periodic structure created by alternating slabs of two materials with positive and negative refractive index. We demonstrate bistable switching and tunable nonlinear transmission in a…

Optics · Physics 2007-05-23 Michael W. Feise , Ilya V. Shadrivov , Yuri S. Kivshar

We introduce the notion of a strong L-space, a closed, oriented rational homology 3-sphere whose Heegaard Floer homology can be determined at the chain level. We prove that the fundamental group of a strong L-space is not left-orderable.…

Geometric Topology · Mathematics 2014-05-02 Adam Simon Levine , Sam Lewallen

This paper defines homology in homotopy type theory, in the process stable homotopy groups are also defined. Previous research in synthetic homotopy theory is relied on, in particular the definition of cohomology. This work lays the…

Logic · Mathematics 2018-12-27 Robert Graham

In this survey article we discuss certain homotopy coherent enhancements of the coalgebra structure on cellular chains defined by an approximation to the diagonal. Over the rational numbers, $C_\infty$-coalgebra structures control the…

Algebraic Topology · Mathematics 2022-04-01 Anibal M. Medina-Mardones

We show how the model structure on the category of simplicially-enriched (colored) props induces a model structure on the category of simplicially-enriched (colored) properads. A similar result holds for dioperads.

Algebraic Topology · Mathematics 2018-04-17 Philip Hackney , Marcy Robertson , Donald Yau

We describe an analogue of the notion of a perverse sheaf in the setting of the derived category of coherent sheaves on an algebraic stack. Under strong additional assumptions the construction of coherent "intersection cohomology" complexes…

Algebraic Geometry · Mathematics 2021-02-04 Dmitry Arinkin , Roman Bezrukavnikov

This short note is extracted from Section 3 and Appendix of the paper entitled with Intersection de Rham complexes in positive characteristic by the same named authors, where an explicit infinite homotopy from a Higgs complex to the…

Algebraic Geometry · Mathematics 2023-02-21 Mao Sheng , Zebao Zhang

We investigate a special kind of contraction of symmetric spaces (respectively, of Lie triple systems), called homotopy. In this first part of a series of two papers we construct such contractions for classical symmetric spaces in an…

Differential Geometry · Mathematics 2012-03-06 Wolfgang Bertram , Pierre Bieliavsky

We prove twisted homological stability with polynomial coefficients for automorphism groups of free nilpotent groups of any given class. These groups interpolate between two extremes for which homological stability was known before, the…

Group Theory · Mathematics 2014-10-15 Markus Szymik