Results 81 to 90 of about 9,562 (223)
Derived non-archimedean analytic spaces
, 2017 International audienceWe propose a derived version of non-archimedean analytic geometry. Intuitively, a derived non-archimedean analytic space consists of an ordinary non-archimedean analytic space equipped with a sheaf of derived rings.
Tony Yue Yu +3 more
core +1 more source
Stability and Superstability of Ring Homomorphisms on Non-Archimedean Banach Algebras
Abstract and Applied Analysis, 2011 Using fixed point methods, we prove the superstability and generalized Hyers-Ulam stability of ring homomorphisms on non-Archimedean Banach algebras. Moreover, we investigate the superstability of ring homomorphisms in non-Archimedean Banach algebras ...
M. Eshaghi Gordji, Z. Alizadeh
doaj +1 more source
Assessing Basis Risk in Margin Insurance for Beef Cattle Farming in Brazil
Agricultural Economics, Volume 57, Issue 4, July 2026.ABSTRACT Price volatility in agricultural markets directly affects the financial viability of rural producers, particularly in sectors characterized by narrow profit margins and long production cycles, such as beef cattle production. Futures contracts and agricultural insurance are commonly used to mitigate this risk; however, both instruments are ...
Beatriz Salandin Dal Pozzo +1 more
wiley +1 more source
Properties of Hierarchical Archimedean Copulas [PDF]
In this paper we analyse the properties of hierarchical Archimedean copulas. This class is a generalisation of the Archimedean copulas and allows for general non-exchangeable dependency structures. We show that the structure of the copula can be uniquely
Yarema Okhrin +2 more
core
Interaction of an Archimedean spiral structure with orbital angular momentum light
New Journal of Physics, 2018 Complementing the research of surface plasmon polariton vortices for Archimedean spiral structures grooved in gold platelets, we here study the analogous positive structure of an Archimedean spiral consisting of bent gold nanorods. We consider spirals of
R M Kerber +6 more
doaj +1 more source
Robust Bernoulli Mixture Models for Credit Portfolio Risk
Mathematical Finance, Volume 36, Issue 3, Page 528-543, July 2026.ABSTRACT This paper presents comparison results and establishes risk bounds for credit portfolios within classes of Bernoulli mixture models, assuming conditionally independent defaults that are stochastically increasing in a common risk factor. We provide simple and interpretable conditions on conditional default probabilities that imply a comparison ...
Jonathan Ansari, Eva Lütkebohmert
wiley +1 more source
Stochastic antiderivational equations on non-Archimedean Banach spaces
International Journal of Mathematics and Mathematical Sciences, 2003 Stochastic antiderivational equations on Banach spaces over local non-Archimedean fields are investigated. Theorems about existence and uniqueness of the solutions are proved under definite conditions.
S. V. Ludkovsky
doaj +1 more source
A remark on stationary fuzzy metric spaces
Karpatsʹkì Matematičnì Publìkacìï, 2013 The main result states that the category of stationary fuzzy metric spaces (with respect to an archimedean $t$-norm) and nonexpanding maps is isomorphic to a full subcategory of the category of metric spaces and nonexpanding maps.
A. Savchenko
doaj +1 more source
Truncated Octahedral PtCu Alloy Nanoparticles for Efficient Methanol Electrooxidation
MetalMat, Volume 3, Issue 2, June 2026.Platinum–copper nano‐truncated octahedra are developed as efficient electrocatalysts for methanol oxidation in alkaline media, exhibiting notably enhanced activity compared to commercial Pt/C. Experimental and theoretical analysis reveals that alloying with copper modifies the electronic structure of platinum, facilitating the key reaction step and ...
Mengfei Liu +5 more
wiley +1 more source
Intelligent Molecular Recognition in Hydrogen‐Bond‐Mediated Supramolecular Polyhedra
SmartMat, Volume 7, Issue 3, June 2026.This perspective highlights the construction of sophisticated hydrogen‐bonded supramolecular polyhedra from macrocycles by emulating the hierarchical assembly of ferritin and viral capsids, and summarizes their selective recognition of individual guest molecules as well as the synergistic encapsulation of multiple species, demonstrating their potential
Ran‐Qi Chen +3 more
wiley +1 more source