Results 61 to 70 of about 347 (187)

Homotopical commutative rings and bispans

Journal of the London Mathematical Society, Volume 111, Issue 6, June 2025.
Abstract We prove that commutative semirings in a cartesian closed presentable ∞$\infty$‐category, as defined by Groth, Gepner, and Nikolaus, are equivalent to product‐preserving functors from the (2,1)‐category of bispans of finite sets. In other words, we identify the latter as the Lawvere theory for commutative semirings in the ∞$\infty$‐categorical
Bastiaan Cnossen, Rune Haugseng, Tobias Lenz, Sil Linskens   +3 more
wiley   +1 more source

On quasi-ideals of semirings

International Journal of Mathematics and Mathematical Sciences, 1994
Several statements on quasi-ideals of semirings are given in this paper, where these semirings may have an absorbing element O or not. In Section 2 we characterize regular semirings and regular elements of semi-rings using quasi-ideals (cf. Thms.
Christoph Dönges
doaj   +1 more source

From Words to Wood: Text‐to‐Procedurally Generated Wood Materials

Computer Graphics Forum, Volume 44, Issue 2, May 2025.
Abstract In the domain of wood modeling, we present a new complex appearance model, coupled with a user‐friendly NLP‐based frontend for intuitive interactivity. First, we present a procedurally generated wood model that is capable of accurately simulating intricate wood characteristics, including growth rings, vessels/pores, rays, knots, and figure ...
Mohcen Hafidi, Alexander Wilkie
wiley   +1 more source

New building blocks for F1${\mathbb {F}}_1$‐geometry: Bands and band schemes

Journal of the London Mathematical Society, Volume 111, Issue 4, April 2025.
Abstract We develop and study a generalization of commutative rings called bands, along with the corresponding geometric theory of band schemes. Bands generalize both hyperrings, in the sense of Krasner, and partial fields in the sense of Semple and Whittle.
Matthew Baker, Tong Jin, Oliver Lorscheid   +2 more
wiley   +1 more source

Integrating amyloid imaging and genetics for early risk stratification of Alzheimer's disease

Alzheimer's &Dementia, Volume 20, Issue 11, Page 7819-7830, November 2024.
Abstract INTRODUCTION Alzheimer's disease (AD) initiates years prior to symptoms, underscoring the importance of early detection. While amyloid accumulation starts early, individuals with substantial amyloid burden may remain cognitively normal, implying that amyloid alone is not sufficient for early risk assessment.
Bing He, Ruiming Wu, Neel Sangani, Pradeep Varathan Pugalenthi, Alice Patania, Shannon L. Risacher, Kwangsik Nho, Liana G. Apostolova, Li Shen, Andrew J. Saykin, Jingwen Yan, for the Alzheimer's Disease Neuroimaging Initiative   +11 more
wiley   +1 more source

Fire exclusion alters forest evapotranspiration: A comprehensive water budget analysis in longleaf pine woodlands

Ecological Monographs, Volume 94, Issue 4, November 2024.
Abstract Forests are critical to water resources, but high evapotranspiration (ET) can reduce water yield. Thinning and prescribed fire reduce forest density and often reduce ET, promoting higher water yield. However, results from such treatments have been inconsistent, possibly because of unknown interactions among individual ET components. We compare
Steven T. Brantley, O. Stribling Stuber, Dakota L. Holder, R. Scott Taylor   +3 more
wiley   +1 more source

Universal quadratic forms and Northcott property of infinite number fields

Journal of the London Mathematical Society, Volume 110, Issue 5, November 2024.
Abstract We show that if a universal quadratic form exists over an infinite degree, totally real extension of the field of rationals Q$\mathbb {Q}$, then the set of totally positive integers in the extension does not have the Northcott property. In particular, this implies that no universal form exists over the compositum of all totally real Galois ...
Nicolas Daans, Vítězslav Kala, Siu Hang Man   +2 more
wiley   +1 more source

Patterns, timing, and environmental drivers of growth in two coexisting green‐stemmed Mediterranean alpine shrubs species

New Phytologist, Volume 241, Issue 1, Page 114-130, January 2024.
Summary The Mediterranean alpine is one of the most vulnerable ecosystems under future environmental change. Yet, patterns, timing and environmental controls of plant growth are poorly investigated. We aimed at an improved understanding of growth processes, as well as stem swelling and shrinking patterns, by examining two common coexisting green ...
Eike Corina Albrecht, Svenja Dobbert, Roland Pape, Jörg Löffler   +3 more
wiley   +1 more source

Tropical semirings

, 1998
This article has been published in the proceedings of the "Idempotency" conference, organized by Jeremy Gunawardena in Bristol in october 1994. The aim of this paper is to present the tropical semirings and to survey a few problems relevant to them.
openaire   +2 more sources

Mechanical Response and Control Measures of Pile Foundations under Close‐Range Shield Tunneling in Water‐Rich Sandy Pebble Strata

Advances in Civil Engineering, Volume 2024, Issue 1, 2024.
By relying on the foundation engineering of pile foundations for the Chengdu Metro Line 27 shield tunneling through interchange bridges, three‐dimensional numerical simulation results are used to verify field measurements. This study investigates the horizontal displacement, vertical displacement, and stress characteristics of the pile foundation ...
Yanpeng Du, Peng Zhang, Jiabing Zhang, Wangjie Wu   +3 more
wiley   +1 more source