Results 101 to 110 of about 25,187 (240)
Energies, 2017 To alleviate environmental pollution and improve the efficient use of energy, energy systems integration (ESI)—covering electric power systems, heat systems and natural gas systems—has become an important trend in energy utilization.
Jiaqi Shi +3 more
doaj +1 more source
Thurston norm for coherent right‐angled Artin groups via L2$L^2$‐invariants
Journal of Topology, Volume 19, Issue 2, June 2026.Abstract We define a new notion of splitting complexity for a group G$G$ along a non‐trivial integral character ϕ∈H1(G;Z)$\phi \in H^1(G; \mathbb {Z})$. If G$G$ is a one‐ended coherent right‐angled Artin group, we show that the splitting complexity along an epimorphism ϕ:G→Z$\phi \colon G \rightarrow \mathbb {Z}$ equals the L2$L^2$‐Euler characteristic
Monika Kudlinska
wiley +1 more source
Topological Algebra and its Applications, 2017 Let R be an open equivalence relation on a topological space E. We define on E a new equivalence relation ̃ℜ̅ by x̃ ̃ℜ̅y if the closure of the R-trajectory of x is equal to the closure of the R-trajectory of y.
Hattab Hawete
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St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 To verify the solution of a typical Crocco boundary problem, a numerical experiment was performed using an implicit second-order difference scheme. It is shown that a numerical solution approximates a weak solution of a typical Crocco limit problem ...
Petrichenko Mikhail, Kotov Eugene
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Twisted ambidexterity in equivariant homotopy theory
Journal of Topology, Volume 19, Issue 2, June 2026.Abstract We develop the concept of twisted ambidexterity in a parametrized presentably symmetric monoidal ∞$\infty$‐category, which generalizes the notion of ambidexterity by Hopkins and Lurie and the Wirthmüller isomorphisms in equivariant stable homotopy theory, and is closely related to Costenoble–Waner duality.
Bastiaan Cnossen
wiley +1 more source
Nadler and Kannan Type Set Valued Mappings in M-Metric Spaces and an Application
Mathematics, 2019 This article intends to initiate the study of Pompeiu–Hausdorff distance induced by an M-metric. The Nadler and Kannan type fixed point theorems for set-valued mappings are also established in the said spaces.
Pradip R. Patle +4 more
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A Log-linear Homotopy Approach to Initialize the Parameterized Expectations Algorithm [PDF]
In this paper I present a proposal to obtain appropriate initial conditions when solving general equilibrium rational expectations models with the Parameterized Expectations Algorithm.
Javier J. Pérez
core
Homotopy pull-back squares up to localization
, 2006 We characterize the class of homotopy pull-back squares by means of elementary closure properties. The so called Puppe theorem which identifies the homotopy fiber of certain maps constructed as homotopy colimits is a straightforward consequence. Likewise
Pitsch, Wolfgang, +2 more
core
The persistent homotopy type distance [PDF]
, 2019 We introduce the persistent homotopy type distance d_HT to compare two real-valued functions dened on possibly different homotopy equivalent topological spaces. The underlying idea in the denition of d_HT is to measure the minimal shift that is necessary
Frosini, Patrizio +2 more
core +1 more source
Elliptic systems at resonance for jumping non-linearities
Electronic Journal of Differential Equations, 2016 In this article, we study the existence of nontrivial solutions for the problem $$\displaylines{ -\Delta u=\alpha _1u^{+}-\beta _1u^{-}+f(x,u,v)+h_1( x) \quad \text{in }\Omega, \cr -\Delta v=\alpha _2v^{+}-\beta _2v^{-}+g(x,u,v)+h_2( x) \quad \text ...
Hakim Lakhal, Brahim Khodja
doaj