Search results for: COHOMOLOGY RING

• Computation of cubical homology, cohomology, and (co)homological operations via chain contraction

  Publication

  • P. Pilarczyk
  • P. Real

  - ADVANCES IN COMPUTATIONAL MATHEMATICS - Year 2015

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• Ming Qing Yanjiu

  Journals

  ISSN: 1724-8574 , eISSN: 2468-4791

• The RING

  Journals

  ISSN: 0035-5429 , eISSN: 2083-3520

• The relative cup-length in local Morse cohomology

  Publication

  • T. O. Rot
  • M. Starostka
  • N. Waterstraat

  - Topological Methods in Nonlinear Analysis - Year 2024

  Local Morse cohomology associates cohomology groups to isolating neighborhoods of gradient flows of Morse functions on (generally non-compact) Riemannian manifolds M. We show that local Morse cohomology is a module over the cohomology of the isolating neighborhood, which allows us to define a cup-length relative to the cohomology of the isolating neighborhood that gives a lower bound on the number of critical points of functions...

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• Morse cohomology in a Hilbert space via the Conley index

  Publication

  • M. Starostka

  - Journal of Fixed Point Theory and Applications - Year 2015

  The main theorem of this paper states that Morse cohomology groups in a Hilbert space are isomorphic to the cohomological Conley index. It is also shown that calculating the cohomological Conley index does not require finite-dimensional approximations of the vector field. Further directions are discussed.

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• Tree-Ring Research

  Journals

  ISSN: 1536-1098 , eISSN: 2162-4585

• Ring thruster with magnetic bearings

  Publication

  • L. Matuszewski
  • K. Falkowski

  - Year 2003

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• Gravitation & Cosmology

  Journals

  ISSN: 0202-2893 , eISSN: 1995-0721

• The reliability of ring, star and hybrid networks

  Publication

  • J. Kozłowska

  - Year 2007

  Jednym z parametrów charakteryzującym jakość sieci jest jej niezawodność. Rozważono sieci o topologiach drzewiastych, gwiaździstych, pętlowych, wielo-pętlowych oraz mieszanych. Przyjęto następujący model uszkodzeń. Węzły oraz kanały sieci ulegają uszkodzeniom z określonym prawdopodobieństwem, uszkodzenia elementów sieci są od siebie statystycznie niezależne. Jako oceny niezawodności sieci przyjęto: średnią liczbę sprawnych par...

• Ring thruster - a preliminary optimisation study

  Publication

  • L. Matuszewski

  - Polish Maritime Research - Year 2009

  The ring thruster is a new type of propeller, for which there is no experimental data to verify analytical design calculations. A significant feature of the ring thruster is the absence of a shaft. Propeller blades are mounted to the ring rotating inside the housing, which has the shape of a nozzle. For this reason the ring thruster is closest, with respect to both the construction and principle of operation, to the Kort nozzle...

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