Results 11 to 20 of about 1,914 (167)

Detecting K‐Theory by Cyclic Homology [PDF]

open access: yes, 2005
We discuss which part of the rationalized algebraic K‐theory of a group ring is detected via trace maps to Hochschild homology, cyclic homology, periodic cyclic or negative cyclic homology. 2000 Mathematics Subject Classification 19D55.
W. Lueck, H. Reich
semanticscholar   +1 more source

A resolution of the K(2)-local sphere at the prime 3 [PDF]

open access: yes, 2005
We develop a framework for displaying the stable homotopy theory of the sphere, at least after localization at the second Morava K-theory K(2). At the prime 3, we write the spectrum LK(2)S 0 as the inverse limit of a tower of fibrations with four layers.
P. Goerss   +3 more
semanticscholar   +1 more source

Some Frechet algebras for which the Chern character is an isomorphism [PDF]

open access: yes, 2005
Using similarities between topological K-theory and periodic cyclic ho- mology we show that, after tensoring with C, for certain Frechet algebras the Chern character provides an isomorphism between these functors.
M. Solleveld
semanticscholar   +1 more source

Chow groups with coefficients

open access: yesDocumenta Mathematica, 1996
We develop a generalization of the classical Chow groups in order to have available some standard properties for homology theories: long exact sequences, spectral sequences for brations, homotopy invariance and intersections.
M. Rost
semanticscholar   +1 more source

D-Brane Instantons and K-Theory Charges [PDF]

open access: yes, 2001
We discuss some physical issues related to the K-theoretic classification of D-brane charges, putting an emphasis on the role of D-brane instantons.
J. Maldacena, G. Moore, N. Seiberg
semanticscholar   +1 more source

D-branes and bivariant K-theory [PDF]

open access: yes, 2008
We review various aspects of the topological classification of D-brane charges in K-theory, focusing on techniques from geometric K-homology and Kasparov's KK-theory.
R. Szabo
semanticscholar   +1 more source

Strong shift equivalence theory and the shift equivalence problem

open access: yes, 1999
. This paper discusses strong shift equivalence and counterexamples to the long standing Shift Equivalence Problem in symbolic dynamics. We also discuss how strong shift equivalence theory is closely related to areas of mathematics outside dynamics such ...
J. Wagoner
semanticscholar   +1 more source

Interplay of Polar Order and Positional Order in Liquid Crystals–Observation of Re‐entrant Ferroelectric Nematic Phase

open access: yesAngewandte Chemie, EarlyView.
In most systems the degree of order increases monotonically with decreasing temperature. Here we report that due to unfavourable dipole interactions within the smectic layers, the lamellar structure of a liquid crystal may be spontaneously destroyed by the development of polar, ferroelectric order.
Grant J. Strachan   +8 more
wiley   +2 more sources

Fluorophobic Effect Enables Selective Detection of PFAS in Water with Electrolyte‐Gated Organic Transistors

open access: yesAdvanced Functional Materials, EarlyView.
PerFluoroAlkyl Substances (PFAS) are responsible of major and persistent environmental pollution worldwide. This work demonstrates an ultra‐sensitive sensor for PFAS based on an organic transistor whose gate is functionalized with a binary self‐assembled monolayer containing a perfluorinated molecule.
Rian Zanotti   +8 more
wiley   +1 more source

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