Results 71 to 80 of about 114,854,271 (184)
The Euler characteristic as a basis for teaching topology concepts to crystallographers. [PDF]
J Appl Crystallogr, 2022 Naskręcki B, Jaskolski M, Dauter Z.
europepmc +1 more source
Neuroprotection, EarlyView.Based on GBD 2021, the study analyzed the temporal trends of ischemic stroke (IS) burden in China from 1990 to 2021 and forecasted incidence and mortality through 2050. The absolute burden of IS in China will continue to rise by 2050, driven mainly by population aging, with faster age‐standardized incidence rate growth in females than males.
Yijun Zhang +5 more
wiley +1 more source
Analytic Torsion of Generic Rank Two Distributions in Dimension Five. [PDF]
J Geom Anal, 2022 Haller S.
europepmc +1 more source
Coverage‐based rarefaction fails to quantify relative species richness
Oikos, EarlyView.Coverage‐based rarefaction (CBR) is a high‐profile tool for assessing biodiversity that provides relative species richness estimates by leveraging the Good‐Turing index u to interpolate. In contrast to alternatives such as the Shannon and Simpson indices, CBR's main appeal is providing values in units of species. CBR is tested against a series of other
John Alroy
wiley +1 more source
Poncelet property and quasi-periodicity of the integrable Boltzmann system. [PDF]
Lett Math Phys, 2021 Felder G.
europepmc +1 more source
Coexisting ant species differ in ability to meet their intrinsic nutritional needs
Oikos, EarlyView.Coexisting species are often assumed to reduce competition by foraging for foods that differ in nutrient composition, but few studies test whether field nutritional differences correspond to intrinsic differences in macronutrient selectivity. We compared field estimates of worker trophic position (tissue isotopes: δ15N) and worker tissue stoichiometry (
Hannah L. Riskas +4 more
wiley +1 more source
Modeling of Curvilinear Steel Rod Structures Based on Minimal Surfaces. [PDF]
Materials (Basel), 2021 Dzwierzynska J, Labuda I.
europepmc +1 more source
Introduction to Derived Algebraic Geometry
openDerived Algebraic Geometry arises from the interplay between classical algebraic geometry, homotopy theory, and higher category theory. Building on the work of Grothendieck, Verdier, and Illusie, the theory developed through Quillen’s homotopical ...
DE PIERI, JACOPO
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On Splitting Coverings of Algebraic Varieties
, 2007 這篇文章的主要目的是介紹一些三次覆蓋的性質。首先，我們會介紹一些關於三次覆蓋的篡本＇隨質，並且利用三次覆蓋的技巧去構造出一個 Pg = q → 2 ，磯＝ 5 的代數曲面。最後，我們會把類似的技巧誰廣到四次覆蓋去構造一個 P 〞 ＝ q → 2 ，磯＝ 6 的代數曲面。The main purpose of this article is to introduce some properties of triple coverings.
李庭諭, Lee, Ting-Yu
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Developments in noncommutative differential geometry [PDF]
, 2002 One of the great outstanding problems of theoretical physics is the quantisation of gravity, and an associated description of quantum spacetime. It is often argued that, at short distances, the manifold structure of spacetime breaks down and is replaced ...
Hale, Mark
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