Results 31 to 40 of about 73,247 (194)

Constructing Witt–Burnside rings

Advances in Mathematics, 2006
The main theorem of this paper describes an isomorphism between the Witt-Burnside ring over a commutative monoid ring \({\mathbb Z}[M]\) and the Grothendieck ring of a category whose objects are almost finite \(G\)-sets \(X\) for a profinite group \(G\), equipped with a map \(X\rightarrow M\), that is constant on \(G\)-orbits.
openaire   +1 more source

Tracing the origins and evolution of nymphalid butterflies (Lepidoptera) in the Atlantic Forest

Ecography, EarlyView.
Understanding the relative roles of diversification and dispersal is key to explaining large‐scale biogeographical patterns. Although both processes are known to shape biodiversity, their relative contributions remain understudied for many organisms. Here, we examine how these processes have jointly contributed to the exceptional diversity and endemism
Mar Repullés, Nicolas Chazot, Leidys Murillo‐ Ramos, Marianne Espeland, Karina Lucas Silva‐ Brandão, Alexandre Antonelli, André Victor Lucci Freitas, Pável Matos‐Maraví   +7 more
wiley   +1 more source

Semiorderings and Witt rings [PDF]

Bulletin of the Australian Mathematical Society, 2003
For a pythagorean fieldFwith semiorderingQand associated preorderingT, it is shown that the Witt ringWT(F) is isomorphic to the Witt ringW(K) whreKis a closure ofFwith respect toQ. For an arbitrary preorderingT, it is shown how the covering number ofTrelates to the construction ofWT(F).
Craven, Thomas C., Smith, Tara L.
openaire   +1 more source

Connecting the dots: A narrative review of the relationship between heart failure and cognitive impairment

ESC Heart Failure, Volume 12, Issue 2, Page 1119-1131, April 2025.
Abstract Large clinical data underscore that heart failure is independently associated to an increased risk of negative cognitive outcome and dementia. Emerging evidence suggests that cerebral hypoperfusion, stemming from reduced cardiac output and vascular pathology, may contribute to the largely overlapping vascular dementia and Alzheimer's disease ...
Mauro Massussi, Maria Giulia Bellicini, Marianna Adamo, Andrea Pilotto, Marco Metra, Alessandro Padovani, Riccardo Proietti   +6 more
wiley   +1 more source

Functionality of symptoms and interpersonal communication in home video recordings of functional/dissociative versus epileptic seizures

Epilepsia, EarlyView.
Abstract Objective Conceptualizing functional/dissociative seizures (FDS) as resulting from dissociation, or conversion, we hypothesized that, compared to epileptic seizures (ES), FDS should carry more symbolic or communicative content and that this would allow observers to distinguish FDS from ES.
Nayrin Dissouky, Klara Kochs, Robert Daniel Nass, Tobias Baumgartner, Attila Rácz, Rainer Surges, Markus Reuber, Juri‐Alexander Witt, Christoph Helmstaedter   +8 more
wiley   +1 more source

Half Factorial Witt Rings

Journal of Algebra, 1993
Let \(R\) be the Witt ring of a formally real field \(F\), \((R_{\text{red}},G_{\text{red}})\) its reduced Witt ring and \(C(R)\) the ideal class group of \(R\) [defined in the author's paper, J. Algebra 124, 506-520 (1989; Zbl 0682.10016)]. \(R\) is called a half factorial ring if for every odd dimensional non-unit in \(R\) any two factorizations into
openaire   +2 more sources

Validation of DSM‐5 Severity Specifiers for Bulimia Nervosa and Binge Eating Disorder and an Alternative Specifier for Binge Eating Disorder in a Korean Cohort

European Eating Disorders Review, EarlyView.
ABSTRACT Objective We examined the clinical validity of DSM‐5 severity specifiers for bulimia nervosa (BN) and binge eating disorder (BED) in Korean outpatients. Method Seven hundred ninety‐nine outpatients with BN (n = 668; mean age = 23.7 years; 95% female; mean BMI = 20.54 kg/m2) or BED (n = 131; mean age = 26.1 years; 89% female; mean BMI = 25.07 ...
Zhen An, Youl‐Ri Kim, Janet Treasure
wiley   +1 more source

A McKay Correspondence in Positive Characteristic

Forum of Mathematics, Sigma
We establish a McKay correspondence for finite and linearly reductive subgroup schemes of ${\mathbf {SL}}_2$ in positive characteristic.
Christian Liedtke
doaj   +1 more source

The Many Facets of Workplace Moral Courage: Development and Validation of a Multidimensional Scale

Human Resource Development Quarterly, EarlyView.
ABSTRACT In the battle against unethical behavior in organizations, fostering employees' moral courage proves vital beyond conventional regulation and compliance efforts. To propel this frontier and empower individuals to uphold moral values, a robust measure of workplace moral courage becomes imperative.
Nicole Witt, Carmen Tanner
wiley   +1 more source

Marshall’s Quotient and the Arason–Pfister Hauptsatz for Reduced Special Groups

Mathematics
We provide a new proof of the Arason–Pfister Hauptsatz (APH) in the setting of reduced special groups, as developed by Dickmann and Miraglia. Our approach avoids the use of Boolean invariants and instead relies on a construction inspired by Marshall’s ...
Kaique Matias de Andrade Roberto, Hugo Luiz Mariano   +1 more
doaj   +1 more source