This paper studies representation stability in the sense of Church and Farb for representations of the symmetric group S n on the cohomology of the configuration space of n ordered points in R d. This cohomology is known to vanish outside of dimensions divisible by d − 1; it is shown here that the S n-representation on the i(d − 1)st coho-mology stabilizes sharply at n = 3i (resp. n = 3i + 1) w...

introduction: the survival of an implant system is affected by the choice of antirotational design, which can include an external or internal hex. implant success also is affected by the maintenance of the crestal bone around implants. the aim of present study was to evaluate the crestal bone loss and clinical parameters related to bone loss in patients loaded with an external or internal hex 3...

The title complex, systematic name hexa-kis-(μ2-4-tert-but-oxy-4-oxobut-2-en-2-olato)-1:2κ(9) O (2),O (4):O (2);2:3κ(9) O (2),O (4):O (2)-trizinc, [Zn3(C8H13O3)6], syn-the-sized from tert-butyl aceto-acetate and di-ethyl-zinc, consists of trinuclear centrosymmetric mol-ecules of an approximate C 3i symmetry. The three metal cations are arranged in a linear fashion, with the central Zn(II) atom ...

Although claimed for a many electron system, some of the (nonradiative and nonretarded) QED energy expressions (i.e., Eqs. (92), (95), and (107)) in Ref.1 are found to hold only for the special case of two electrons. In particular, except for the diagrams considered before (see Figs. (3a) to (3h)), the socalled three-electron-two-photon diagram2 shown in Fig. (3i) should also be included for th...

background: gp41 of hiv (human immunodeficiency virus) is a protein that mediates fusion between viral and cellular membranes. the agent, t-20, which has been approved for hiv inhibition, can restrain gp41 function in the fusion process; nevertheless, it has disadvantages like instability, high cost of production and injection form to be delivered twice a day. methods: several molecules like nb...

It is shown that the inclusion of excited ionic configurations in the diatomics-in-molecules (DIM) Hamiltonian serves as a natural means to account for main features of non-additivity in three-body potential energy surfaces of He-CI 2 and Ar-CI 2 van der Waals complexes. For ground state C12(1Eg), while consideration of only neutral configurations leads to T-shaped isomers, inclusion of the exc...

We prove that the free Burnside Group B(3; 2) has order 27 and is isomorphic to ha; b j a3; b3(ab)3; (b 1a)3i. The technique of our proof is also used to show that ha; bja3; b3; a2(ba)nb2i is the semidirect product Cn2+n+1o C3.

In Canada, Hansen disease (leprosy) is rare and not considered in diagnoses for nonimmigrant patients. We report Mycobacterium leprae infection in a Canadian man whose sole travel was to Florida, USA. The M. leprae isolate was identified as armadillo-associated genotype 3I-2-v1. Travelers to the southern United States should avoid contact with armadillos.