Results 31 to 40 of about 31,935 (188)

A heuristic review on the homotopy perturbation method for non-conservative oscillators

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2022
The homotopy perturbation method (HPM) was proposed by Ji-Huan. He was a rising star in analytical methods, and all traditional analytical methods had abdicated their crowns.
Chun-Hui He, Yusry O El-Dib
doaj   +1 more source

Homotopy theory of modules over diagrams of rings

open access: yesProceedings of the American Mathematical Society, Series B, 2014
Given a diagram of rings, one may consider the category of modules over them. We are interested in the homotopy theory of categories of this type: given a suitable diagram of model categories ℳ(𝓈) (as 𝓈 runs through the diagram ...
J. P. C. Greenlees, B. Shipley
doaj   +1 more source

Directed Homotopy in Non-Positively Curved Spaces [PDF]

open access: yesLogical Methods in Computer Science, 2020
A semantics of concurrent programs can be given using precubical sets, in order to study (higher) commutations between the actions, thus encoding the "geometry" of the space of possible executions of the program.
Eric Goubault, Samuel Mimram
doaj   +1 more source

Comparing homotopy categories [PDF]

open access: yesJournal of K-Theory, 2007
AbstractGiven a suitable functorT:→between model categories, we define a long exact sequence relating the homotopy groups of anyXεwith those ofTX, and use this to describe an obstruction theory for lifting an objectGεto. Examples include finding spaces with given homology or homotopy groups.
openaire   +3 more sources

Solving Newell-Whitehead-Segel Equation By using Elzaki Transform and its inverse with The Homotopy Perturbation Method [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics
This research is a ‌combination of the homotopy ‌perturbation method with ‌Elzaki transform method ‌and Elzaki inverse to ‌solve some nonlinear ‌partial differential ‌equations.
Mohammed Alsofey   +1 more
doaj   +1 more source

Homotopy homomorphisms and the classifying space functor

open access: yes, 2014
We show that the classifying space functor $B: Mon \to Top*$ from the category of topological monoids to the category of based spaces is left adjoint to the Moore loop space functor $\Omega': Top*\to Mon$ after we have localized $Mon$ with respect to all
Vogt, R. M.
core   +1 more source

Many homotopy categories are homotopy categories

open access: yesTopology and its Applications, 2006
A well known theorem of \textit{A. Strøm} [Arch. Math. 23, 435--441 (1972; Zbl 0261.18015)] states that the category of topological spaces admits a model category structure where weak equivalences are homotopy equivalences and fibrations are Hurewicz fibrations. The paper generalizes this result as follows.
openaire   +2 more sources

Fusion categories and homotopy theory

open access: yesQuantum Topology, 2010
We apply the yoga of classical homotopy theory to classification problems of G -extensions of fusion and braided fusion categories, where G is a finite group. Namely, we reduce such problems to classification (up to homotopy) of maps from BG
Etingof, Pavel I.   +2 more
openaire   +4 more sources

Idempotents in intensional type theory [PDF]

open access: yesLogical Methods in Computer Science, 2017
We study idempotents in intensional Martin-L\"of type theory, and in particular the question of when and whether they split. We show that in the presence of propositional truncation and Voevodsky's univalence axiom, there exist idempotents that do not ...
Michael Shulman
doaj   +1 more source

On Something Like an Operational Virtuality

open access: yesHumanities, 2021
We outline here a certain history of ideas concerning the relation between intuitions and their external verification and consider its potential for detrivializing the concept of virtuality.
Alexander Wilson
doaj   +1 more source

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