Vol. XLV (June 2008), 379–389 379 © 2008, American Marketing Association ISSN: 0022-2437 (print), 1547-7193 (electronic) *Henrik Hagtvedt is a doctoral student in Marketing (e-mail: [email protected]), and Vanessa M. Patrick is Assistant Professor of Marketing (e-mail: [email protected]), Terry College of Business, University of Georgia. Both authors contributed equally to this research. They ...

The fixed point index of topological fixed point theory is a well studied integer-valued algebraic invariant of a mapping which can be characterized by a small set of axioms. The coincidence index is an extension of the concept to topological (Nielsen) coincidence theory. We demonstrate that three natural axioms are sufficient to characterize the coincidence index in the setting of continuous m...

VI Kolte L, Gaardbo JC, Karlsson I, Sørensen AL, Ryder LP, Skogstrand K, Ladelund S, Nielsen SD. Dysregulation of CD4+CD25+CD127lowFOXP3+ Regulatory T-cells in HIV-infected pregnant women. Blood. 2011 Feb 10;117(6):1861-8. VII Kolte L, Rosenfeldt V, Vang L, Jeppesen DL, Karlsson I, Ryder LP, Skogstrand K, Nielsen SD. Reduced thymic size but no evidence of impaired thymic function in uninfected ...

The Nielsen-Schreier Theorem states that every subgroup of a free group is free. To formalize this theorem in weak subsystems of second order arithmetic, one has to choose between defining a subgroup in terms of a set of group elements and defining it in terms of a set of generators. We show that if subgroups are defined by sets, then the Nielsen-Schreier Theorem is provable in RCA0, while if s...

The paper is based on the authors’ work for the HiTrans Interreg III-project (Nielsen, Lange et al. 2005), recent work on a good practice guide for public transport system design in rural and small town regions for the Norwegian Ministry of Transport and Communications (Nielsen and Lange 2008), earlier literature studies and consultancy work for various public transport bodies in Norway. The id...

The relative Lefschetz and Nielsen fixed-point theorems are generalized for compact absorbing contractions on ANR-spaces and nilmanifolds. The nontrivial Lefschetz number implies the existence of a fixedpoint in the closure of the complementary domain. The relative Nielsen numbers improve the lower estimate of the number of coincidences on the total space or indicate the location of fixed-point...

We show that it is possible, in opposition to a previous conjecture, to derive a Nielsen identity for the effective action in the case of the generalized Rξgauge, where the gauge function explicitly depends on the gauge parameter ξ. Also the Nielsen identity for the effective potential is verified to one-loop in the Abelian Higgs model and the corresponding identity for the physical Higgs mass ...

We consider complex Fenchel–Nielsen coordinates on the quasi-Fuchsian space of punctured tori. These coordinates arise from a generalisation of Kra’s plumbing construction and are related to earthquakes on Teichmüller space. They also allow us to interpolate between two coordinate systems on Teichmüller space, namely the classical Fuchsian space with Fenchel–Nielsen coordinates and the Maskit e...

We consider classical and quantum propagators for two different time intervals. If these propagators follow one another in a Fibonacci sequence we get a discrete quasiperiodic system. A theorem due to Nielsen provides a novel conserved quantity for this system. The Nielsen quantity controls the transition between commutative and non-commutative propagation in time. The quasiperiodically kicked ...