Results 11 to 20 of about 5,760 (118)
Ecosystem services provided by spiders. [PDF]
Biol Rev Camb Philos SocABSTRACT Spiders, ubiquitous and abundant predators in terrestrial ecosystems, often are the subjects of an unjust negative perception. However, these remarkable creatures stand as unsung heroes within our ecosystems, contributing a multitude of ecosystem services critical to human well‐being.
Cardoso P +13 more
europepmc +2 more sources
, 2008 Many things in mathematics seem lamost unreasonably nice. This includes objects, counterexamples, proofs. In this preprint I discuss many examples of this phenomenon with emphasis on the ring of polynomials in a countably infinite number of variables in ...
Hazewinkel, Michiel
core +2 more sources
Boolean Witt vectors and an integral Edrei-Thoma theorem [PDF]
, 2015 A subtraction-free definition of the big Witt vector construction was recently given by the first author. This allows one to define the big Witt vectors of any semiring.
Borger, James, Grinberg, Darij
core +2 more sources
The basic geometry of Witt vectors, II: Spaces [PDF]
, 2015 This is an account of the algebraic geometry of Witt vectors and arithmetic jet spaces. The usual, "p-typical" Witt vectors of p-adic schemes of finite type are already reasonably well understood.
Borger, James
core +3 more sources
Milnor K-theory and the graded representation ring [PDF]
, 2011 Let F be a field, let G be its absolute Galois group, and let R(G, k) be the representation ring of G over a suitable field k. In this preprint we construct a ring homomorphism from the mod 2 Milnor K-theory k_*(F) to the graded ring gr R(G, k ...
Pierre Guillot, J. Mináč
semanticscholar +1 more source
On the geometry of lattices and finiteness of Picard groups [PDF]
, 2019 Let (K, O, k) be a p-modular system with k algebraically closed and O unramified, and let Λ be an O-order in a separable K-algebra. We call a Λ-lattice L rigid if Ext1Λ(L, L) = 0, in analogy with the definition of rigid modules over a finite-dimensional ...
Eisele, F.
core +4 more sources
Heights and quadratic forms: on Cassels' theorem and its generalizations [PDF]
, 2012 In this survey paper, we discuss the classical Cassels' theorem on existence of small-height zeros of quadratic forms over Q and its many extensions, to different fields and rings, as well as to more general situations, such as existence of totally ...
Fukshansky, Lenny
core +2 more sources
Zeta functions, Grothendieck groups, and the Witt ring
, 2014 We prove some results connecting the zeta functions of varieties over finite fields with the big Witt ring over $\mathbb Z$. We explore relations with motivic measures and a classical formula of Macdonald on invariants of symmetric products of a variety ...
Ramachandran, Niranjan
core +1 more source
Global Policy, EarlyView.ABSTRACT On‐orbit rendezvous and docking constitute one of the most technically challenging activities in the history of space activities. As space endeavours mature to crewed missions, space rendezous and docking technologies (RDT) emerge as an area of technological innovation critical to advances in future crewed space exploration.
Nikita Chiu, Markus Kornprobst
wiley +1 more source
Journal of Marriage and Family, EarlyView.ABSTRACT Objective This study examines how parental housework time and labor market participation during early childhood are associated with adolescents' housework participation. Background Prior research shows that parental time use is associated with adolescents' housework in gendered ways.
Kefan Xue, Boyan Zheng
wiley +1 more source