2,471 research outputs found
Rigidity in Equivariant Stable Homotopy Theory
For any finite group G, we show that the 2-local G-equivariant stable
homotopy category, indexed on a complete G-universe, has a unique equivariant
model in the sense of Quillen model categories. This means that the suspension
functor, homotopy cofiber sequences and the stable Burnside category determine
all "higher order structure" of the 2-local G-equivariant stable homotopy
category, such as the equivariant homotopy types of function G-spaces. The
theorem can be seen as an equivariant version of Schwede's rigidity theorem at
the prime 2
On the Algebraic Classification of Module Spectra
Using methods developed by Franke, we obtain algebraic classification results
for modules over certain symmetric ring spectra (-algebras). In particular,
for any symmetric ring spectrum whose graded homotopy ring has
graded global homological dimension 2 and is concentrated in degrees divisible
by some natural number , we prove that the homotopy category of
-modules is equivalent to the derived category of the homotopy ring
. This improves the Bousfield-Wolbert algebraic classification of
isomorphism classes of objects of the homotopy category of -modules. The
main examples of ring spectra to which our result applies are the -local
real connective -theory spectrum , the Johnson-Wilson spectrum
E(2), and the truncated Brown-Peterson spectrum , for an odd prime .Comment: 39 page
Estimation of fairness in health financing among internally displaced persons and local population in Samegrelo region of West Georgia
Does Active Management Benefit Endowment Returns?
We conduct a longitudinal analysis of the NACUBO Commonfund Study of Endowments (NCSE) results from 2006-2013 to evaluate if active management is related to higher endowment returns in U.S. equities over time. We also analyze the data to evaluate the endowment characteristics that are related to higher levels of performance over time.We find that active management for endowments is significantly positively related to higher returns net of fees from U.S. equity allocations over the evaluation period. In addition, endowments with CIOs or OCIOs are better able to earn incremental positive returns from active management than those without. Larger endowments are better able to earn incremental positive returns from active management than the smallest endowments but the effect appears to diminish as endowments increase in size
Topological Hochschild homology and the cyclic bar construction in symmetric spectra
The cyclic bar construction in symmetric spectra and B\"okstedt's original
construction are two possible ways to define the topological Hochschild
homology of a symmetric ring spectrum. In this short note we explain how to
correct an error in Shipley's original comparison of these two approaches.Comment: v2: 7 pages; exposition improved, accepted for publication in
Proceedings of the AM
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