Results 81 to 90 of about 29,198 (203)
Is every product system concrete?
Transactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.Abstract Is every product system of Hilbert spaces over a semigroup P$P$ concrete, that is, isomorphic to the product system of an E0$E_0$‐semigroup over P$P$? The answer is no if P$P$ is discrete, cancellative and does not embed in a group. However, we show that the answer is yes for a reasonable class of semigroups.
S. Sundar
wiley +1 more source
Lieb-Schultz-Mattis anomalies as obstructions to gauging (non-on-site) symmetries
SciPost PhysicsWe study 't Hooft anomalies of global symmetries in 1+1d lattice Hamiltonian systems. We consider anomalies in internal and lattice translation symmetries.
Sahand Seifnashri
doaj +1 more source
Zeta Functions and the (Linear) Logic of Markov Processes [PDF]
Logical Methods in Computer ScienceThe author introduced models of linear logic known as ''Interaction Graphs'' which generalise Girard's various geometry of interaction constructions. In this work, we establish how these models essentially rely on a deep connection between zeta functions
Thomas Seiller
doaj +1 more source
The contact cut graph and a Weinstein L$\mathcal {L}$‐invariant
Transactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.Abstract We define and study the contact cut graph which is an analogue of Hatcher and Thurston's cut graph for contact geometry, inspired by contact Heegaard splittings (Giroux, Proceedings of the International Congress of Mathematicians, Beijing, 2002; Torisu, Internat. Math. Res. Notices (2000), 441–454).
Nickolas A. Castro +5 more
wiley +1 more source
Real models for the framed little n$n$‐disks operads
Journal of Topology, Volume 18, Issue 4, December 2025.Abstract We study the action of the orthogonal group on the little n$n$‐disks operads. As an application we provide small models (over the reals) for the framed little n$n$‐disks operads. It follows in particular that the framed little n$n$‐disks operads are formal (over the reals) for n$n$ even and coformal for all n$n$.
Anton Khoroshkin, Thomas Willwacher
wiley +1 more source
Livšic Theorem for matrix cocycles [PDF]
Annals of Mathematics, 2011 To appear in Annals of Mathematics.
openaire +3 more sources
Integration of Cocycles and Lefschetz Number Formulae for Differential Operators
Symmetry, Integrability and Geometry: Methods and Applications, 2011 Let E be a holomorphic vector bundle on a complex manifold X such that dim_C X=n. Given any continuous, basic Hochschild 2n-cocycle ψ_{2n} of the algebra Diffn of formal holomorphic differential operators, one obtains a 2n-form f_{E,ψ_{2n}}(D) from any ...
Ajay C. Ramadoss
doaj +1 more source
Dynamics and the Cohomology of Measured Laminations
Mathematics, 2016 In this paper, the interconnection between the cohomology of measured group actions and the cohomology of measured laminations is explored, the latter being a generalization of the former for the case of discrete group actions and cocycles evaluated on ...
Carlos Meniño Cotón
doaj +1 more source
Computations of quandle 2-cocycle knot invariants without explicit 2-cocycles
Journal of Knot Theory and Its Ramifications, 2017 We explore a knot invariant derived from colorings of corresponding [Formula: see text]-tangles with arbitrary connected quandles. When the quandle is an abelian extension of a certain type the invariant is equivalent to the quandle [Formula: see text]-cocycle invariant.
Clark, W. Edwin +2 more
openaire +6 more sources
Lyapunov functions for dichotomies in mean
Electronic Journal of Differential Equations, 2017 We consider the notion of an exponential dichotomy in mean for a cocycle, in which the exponential behavior in the classical notion of an exponential dichotomy is replaced by an average with respect to an invariant probability measure.
Luis Barreira, Claudia Valls
doaj