Group Cohomology and Extensions
Permanent link
https://hdl.handle.net/10037/16251Date
2019-08-31Type
Master thesisMastergradsoppgave
Author
Breivik, Markus NordvollAbstract
The goal of this thesis is to classify all extensions where the kernel has order p^s and the cokernel has order p^t, p is a prime, and 1 ≤ s,t ≤ 2. We determine (up to weak congruence) the different combinations of kernel, cokernel and operators, and for each case, calculate the second cohomology group. By comparing resolutions, we get an explicit correspondence between the second cohomology group and the group of congruence classes of extensions. Using this construction, we determine (up to congruence) the extensions for the different combinations.
Publisher
UiT Norges arktiske universitetUiT The Arctic University of Norway
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Copyright 2019 The Author(s)
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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