TY  - THES
T1  - Central Extensions of Nilpotent Lie and Leibniz Algebras
A1  - Langari, Mouna Bibi
LA  - English
LA  - English
YR  - 2010
UL  - http://discoverylib.upm.edu.my/discovery/Record/oai:psasir.upm.edu.my:12372
AB  - This thesis is concerned with the central extensions of nilpotent Lie and Leibniz algebras. The researcher has used the Skjelbred and Sund's method to
construct all the 6¡dimensional non-isomorphic Lie algebras over complex
numbers.
Skjelbred and Sund have published in 1977 their method of constructing all
nilpotent Lie algebras of dimension n introducing those algebras of dimension
< n, and their automorphism groups. The deployed method in classifying
nilpotent Lie algebras for dimension n is necessarily comprised of two main
steps. For the frist step, a plausibly redundant list of Lie algebras was confirmed which included all n-dimensional nilpotent Lie algebras. The next step
is to discard the isomorphic copies generated from the list of Lie algebras.
By then, the n¡dimensional nilpotent Lie algebras are confirmed as central
extension of nilpotent Lie algebras for smaller dimensions. As the result, the action of the automorphism group is deployed to drastically decrease the number of isomorphic Lie algebras which may appear in the final list. The maple
program is by then deployed to discard the final isomorphic copies from the
calculation. Based on the elaborated method, the researcher must and center
of Lie algebras then drived algebras.
In order to locate a basis for second cohomology group of Lie algebras, the
researcher must locate cocycles as well as coboundary. Further, there is the
requirement to locate the most appropriate action for finding orbits. By then,
every orbit will submit a representative that is illustrated by 0.
KW  - Nilpotent Lie groups
KW  - Lie algebras
ER  -