Results 51 to 60 of about 511,872 (337)

Bounds for the Thurston-Bennequin number from Floer homology [PDF]

open access: yes, 2004
Using a knot concordance invariant from the Heegaard Floer theory of Ozsvath and Szabo, we obtain new bounds for the Thurston-Bennequin and rotation numbers of Legendrian knots in S^3.
Akbulut   +3 more
core   +1 more source

Autoequivalences of derived categories via geometric invariant theory [PDF]

open access: yes, 2013
We study autoequivalences of the derived category of coherent sheaves of a variety arising from a variation of GIT quotient. We show that these automorphisms are spherical twists, and describe how they result from mutations of semiorthogonal ...
Daniel Halpern-Leistner, Ian Shipman
semanticscholar   +1 more source

Stanley Depth of the Edge Ideal of Extended Gear Networks and Application in Circuit Analysis

open access: yesJournal of Mathematics, 2022
Graph theory is widely used in power network analysis, complex network, and engineering calculation. Stanley depth is a geometric invariant of the module which is closely related to an algebraic invariant called depth of the module.
Guiling Zeng   +4 more
doaj   +1 more source

Stratification of singular hyperkähler quotients

open access: yesComplex Manifolds, 2022
Hyperkähler quotients by non-free actions are typically singular, but are nevertheless partitioned into smooth hyperkähler manifolds. We show that these partitions are topological stratifications, in a strong sense.
Mayrand Maxence
doaj   +1 more source

Extremal Gromov-Witten invariants of the Hilbert scheme of $3$ Points

open access: yesForum of Mathematics, Sigma, 2023
We determine all the extremal Gromov-Witten invariants of the Hilbert scheme of $3$ points on a smooth projective complex surface. Our result for the genus- $1$ case verifies a conjecture that we propose for the genus- $1$ extremal ...
Jianxun Hu, Zhenbo Qin
doaj   +1 more source

Higher-form symmetries in 5d

open access: yesJournal of High Energy Physics, 2020
We study higher-form symmetries in 5d quantum field theories, whose charged operators include extended operators such as Wilson line and ’t Hooft operators. We outline criteria for the existence of higher-form symmetries both from a field theory point of
David R. Morrison   +2 more
doaj   +1 more source

Entropy, holography and the second law [PDF]

open access: yes, 2004
The geometric entropy in quantum field theory is not a Lorentz scalar and has no invariant meaning, while the black hole entropy is invariant. Renormalization of entropy and energy for reduced density matrices may lead to the negative free energy even if
A. Peres   +15 more
core   +1 more source

Stringy (Galilei) Newton-Hooke Chern-Simons gravities

open access: yesJournal of High Energy Physics, 2019
We construct Chern-Simons gravities in (2 + 1)-dimensional space-time considering the Stringy Galilei algebra both with and without non-central extensions.
Luis Avilés   +2 more
doaj   +1 more source

The Geometric Proca Field in Weyl Gauge-Invariant Theory

open access: yesUniverse
We present a detailed study on the geometrization of the Proca field in the so-called Weyl Gauge-Invariant Theory, shedding new light on the physical interpretation of the Weyl field. We first describe the field equations of the theory.
M. Duarte   +3 more
doaj   +1 more source

A Euclidean Geometric Invariant of Framed (Un)Knots in Manifolds

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2010
We present an invariant of a three-dimensional manifold with a framed knot in it based on the Reidemeister torsion of an acyclic complex of Euclidean geometric origin.
Jérôme Dubois   +2 more
doaj   +1 more source

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