Results 31 to 40 of about 869,106 (168)
Applied Vegetation Science, Volume 29, Issue 4, October/December 2026.This study provides the first integrated evidence of long‐term human impacts in Ethiopia's Bale Mountains, combining modern vegetation transects with sedimentary steroid and bile acid biomarkers. We identified a sharp 200 m settlement edge and reveal sustained anthropogenic influence from the late Pleistocene, with pastoralism intensifying around 6.5 ...
Mekbib Fekadu +12 more
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Ecology Letters, Volume 29, Issue 10, October 2026.Using > 45,000 waterbird censuses at 2792 European sites, we found functional diversity has increased over time and in warmer winters, but functional redundancy has declined. Ramsar and Special Protection Area sites had the greatest increase in functional richness but the greatest decline in functional redundancy in warmer winters, especially further ...
Tanith B. Hackney +3 more
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Taxonomic revision of the genus Tzveleviochloa (Poaceae, Aveninae) in India
Nordic Journal of Botany, Volume 2026, Issue 9, September 2026.The taxonomy of Tzveleviochloa in India is revised based on morphological evidence, comprehensive observations of herbarium specimens and field records, and several botanical explorations in the study area. The accepted diversity is increased from two to five species, including two recently described species. The genus is distributed in the Western and
Dileshwar Prasad +5 more
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L∞$L^\infty$ compactness of solutions of quasilinear problems and applications
Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.Abstract For a (not necessarily smooth) bounded domain Ω$\Omega$ of RN$\mathbb {R}^N$, N⩾2$N \geqslant 2$ and a Carathéodory vector‐valued function a:Ω×RN→RN$a:\Omega \times \mathbb {R}^N \rightarrow \mathbb {R}^N$, we study the compactness of the inverse of the Leray–Lions operator A(u)=−div(a(x,∇u))$A(u)=-\text{div}(a(x, \nabla u))$, u∈W01,p(Ω)$u\in ...
D. Arcoya +2 more
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Generalized Mountain Pass Lemma Related with a Closed Subset and Locally Lipschitz Functionals
, 2014 The classical Mountain Pass Lemma of Ambrosetti-Rabinowitz has been studied, extended and modified in several directions, notable examples would certainly include the generalization to locally Lipschitz functionals in K.C. Chang, analysis of the structure of the critical set in the mountain pass theorem by Hofer and Pucci-Serrin and Tian, the extension
Li, Fengying, Li, Bingyu, Zhang, Shiqing
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Mathematical Methods in the Applied Sciences, Volume 49, Issue 12, Page 13324-13360, August 2026.ABSTRACT This paper proves the existence of nontrivial solution for two classes of quasilinear systems of the type −ΔΦ1u=Fu(x,u,v)+λRu(x,u,v)inΩ−ΔΦ2v=−Fv(x,u,v)−λRv(x,u,v)inΩu=v=0on∂Ω$$ \left\{\begin{array}{l}\hfill -{\Delta}_{\Phi_1}u={F}_u\left(x,u,v\right)+\lambda {R}_u\left(x,u,v\right)\kern0.1832424242424242em \mathrm{in}\kern0.3em \Omega ...
Lucas da Silva, Marco Souto
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Existencia de Soluciones Radiales para Problemas Semilineales Elípticos Indefinidos
Selecciones Matemáticas, 2020 We study the existence of radial solutions of indefinite semilinear elliptic equations in the unit ball in Rn (n>=3) with Dirichlet boundary conditions, whose nonlinear term has the form lamda.m(|x|)f(u) where m(|.|) is radially symmetric, discontinuous ...
Marco Calahorrano, Israel Cevallos
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Biosystematics and Taxonomic Treatment of Three New Kengyilia Species in the Triticeae (Poaceae)
Ecology and Evolution, Volume 16, Issue 7, July 2026.Three new Kengyilia species have been discovered. These new species have morphological differences from their closely related species. Three Kengyilia species are allohexaploid and contain the StStYYPP genome. Different Kengyilia have different origins.
Xiao‐Yang Pan +11 more
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Infinitely many solutions for fractional Kirchhoff–Sobolev–Hardy critical problems
Electronic Journal of Qualitative Theory of Differential Equations, 2019 We investigate a class of critical stationary Kirchhoff fractional $p$-Laplacian problems in presence of a Hardy potential. By using a suitable version of the symmetric mountain-pass lemma due to Kajikiya, we obtain the existence of a sequence of ...
Vincenzo Ambrosio +2 more
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Mathematische Nachrichten, Volume 299, Issue 5, Page 1004-1027, May 2026.ABSTRACT This paper investigates the existence and non‐existence and uniqueness of global solutions for certain parameter values c$c$ in a new class of generalized fractional p$p$‐Kirchhoff equations in the whole space. Using the Pohozaev and Nehari identities for an auxiliary problem, together with the fractional Gagliardo–Nirenberg inequality and the
J. Vanterler da C. Sousa +2 more
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