On the homology of the Harmonic Archipelago

Umed Karimov; Dušan Repovš

Open Mathematics (2012)

  • Volume: 10, Issue: 3, page 863-872
  • ISSN: 2391-5455

Abstract

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We calculate the singular homology and Čech cohomology groups of the Harmonic Archipelago. As a corollary, we prove that this space is not homotopy equivalent to the Griffiths space. This is interesting in view of Eda’s proof that the first singular homology groups of these spaces are isomorphic.

How to cite

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Umed Karimov, and Dušan Repovš. "On the homology of the Harmonic Archipelago." Open Mathematics 10.3 (2012): 863-872. <http://eudml.org/doc/269484>.

@article{UmedKarimov2012,
abstract = {We calculate the singular homology and Čech cohomology groups of the Harmonic Archipelago. As a corollary, we prove that this space is not homotopy equivalent to the Griffiths space. This is interesting in view of Eda’s proof that the first singular homology groups of these spaces are isomorphic.},
author = {Umed Karimov, Dušan Repovš},
journal = {Open Mathematics},
keywords = {Griffiths space; Harmonic Archipelago; Hawaiian Earring; Fundamental group; Trivial shape; Peano continuum; Wild topology; fundamental group; trivial shape; wild topology},
language = {eng},
number = {3},
pages = {863-872},
title = {On the homology of the Harmonic Archipelago},
url = {http://eudml.org/doc/269484},
volume = {10},
year = {2012},
}

TY - JOUR
AU - Umed Karimov
AU - Dušan Repovš
TI - On the homology of the Harmonic Archipelago
JO - Open Mathematics
PY - 2012
VL - 10
IS - 3
SP - 863
EP - 872
AB - We calculate the singular homology and Čech cohomology groups of the Harmonic Archipelago. As a corollary, we prove that this space is not homotopy equivalent to the Griffiths space. This is interesting in view of Eda’s proof that the first singular homology groups of these spaces are isomorphic.
LA - eng
KW - Griffiths space; Harmonic Archipelago; Hawaiian Earring; Fundamental group; Trivial shape; Peano continuum; Wild topology; fundamental group; trivial shape; wild topology
UR - http://eudml.org/doc/269484
ER -

References

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  1. [1] Balcerzyk S., On factor groups of some subgroups of a complete direct sum of infinite cyclic groups, Bull. Acad. Polon. Sci., 1959, 7, 141–142 
  2. [2] Bogley W.A., Sieradski A.J., Universal path spaces, preprint available at http://people.oregonstate.edu/_bogleyw/research/ups.pdf 
  3. [3] Conner G., Some interesting open problems in low-dimensional wild topology, In: Workshop on Topology of Wild Spaces and Fractals, Strobl, July 4–8, 2011, abstract available at http://dmg.tuwien.ac.at/dorfer/wild_topology/abstracts.pdf 
  4. [4] Curtis M.L., Fort M.K. Jr., Singular homology of one-dimensional spaces, Ann. of Math., 1959, 69, 309–313 http://dx.doi.org/10.2307/1970184 Zbl0088.38502
  5. [5] Eda K., The singular homology groups of certain wild spaces (personal note, September 2011) 
  6. [6] Eda K., Kawamura K., The singular homology of the Hawaiian earring, J. London Math. Soc., 2000, 62(1), 305–310 http://dx.doi.org/10.1112/S0024610700001071 Zbl0958.55004
  7. [7] Fuchs L., Infinite Abelian Groups. I, Pure Appl. Math., 36, Academic Press, New York-London, 1970 
  8. [8] Griffiths H.B., The fundamental group of two spaces with a common point, Q. J. Math., 1954, 5, 175–190 http://dx.doi.org/10.1093/qmath/5.1.175 Zbl0056.16301
  9. [9] Harlap A.E., Local homology and cohomology, homological dimension, and generalized manifolds, Mat. Sb. (N.S.), 1975, 96(138), 347–373 Zbl0312.55006
  10. [10] Hatcher A., Algebraic Topology, Cambridge University Press, Cambridge, 2002 
  11. [11] Meilstrup M., Archipelago groups, In: Workshop on Topology of Wild Spaces and Fractals, Strobl, July 4–8, 2011, abstract available at http://dmg.tuwien.ac.at/dorfer/wild_topology/abstracts.pdf 
  12. [12] Spanier E.H., Algebraic Topology, McGraw-Hill, New York-Toronto, 1966 

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