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On noncontractible compacta with trivial homology and homotopy groupsKarimov, Umed H., 1951- ; Repovš, Dušan, 1954-Konstruiramo primer Peanovega kontinuuma ▫$X$▫ z naslednjimi lastnostmi: (i) ▫$X$▫ je kompaktifikacija poliedra s točko; (ii) ▫$X$▫ je šibko homotopsko ekvivalenten točki (t.j. ▫$\pi_n(X)$▫ je ... trivialna grupa za vse ▫$n \ge 0$▫); (iii) ▫$X$▫ ni kontraktibilen; in (iv) ▫$X$▫ je homološko in kohomološko lokalno povezan (t.j. ▫$X$▫ je HLC in ▫$clc$▫ prostor). Dokažemo tudi, da so vse klasične homološke grupe (singularne, Čechove in Borel-Mooreove), vse klasične kohomološke grupe (singularne in Čechove) ter vse končno dimenzionalne havajske grupe prostora ▫$X$▫ trivialne.Source: Proceedings of the American Mathematical Society. - ISSN 0002-9939 (Vol. 138, no. 4, 2010, str. 1525-1531)Type of material - article, component partPublish date - 2010Language - englishCOBISS.SI-ID - 15382873
Author
Karimov, Umed H., 1951- |
Repovš, Dušan, 1954-
Topics
matematika |
algebrska topologija |
nekontraktibilen kompakt |
šibka homotopska ekvivalenca |
reduciran kompleks |
▫$\widetilde {K}_{\mathcal {C}}$▫-teorija |
Peanov kontinuum |
neskončno-dimenzionalni havajski uhani |
havajska grupa |
mathematics |
algebraic topology |
noncontractible compactum |
weak homotopy equivalence |
reduced complex |
▫$\widetilde {K}_{\mathcal {C}}$▫-theory |
Peano continuum |
infinite-dimensional Hawaiian earrings |
Hawaiian group
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Karimov, Umed H., 1951- | |
Repovš, Dušan, 1954- | 07083 |
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