Engineering↗
Trace, Norm and the Characteristic Polynomial
Trace, norm and characteristic polynomial of a field element, their computation, and their use as invariants and cross-checks.
Tag
Invariants
Every page in the KEVOS library tagged Invariants. 4 pages.
Engineering↗
Definition of Group Homology and Cohomology
Group homology and cohomology as derived functors of coinvariants and invariants, equivalently as Tor and Ext over the group ring, with the basic properties and long exact seque…
Engineering↗
Definition of Lie Algebra Cohomology
Lie algebra cohomology as Ext over the enveloping algebra, invariants and coinvariants, the explicit description in degrees 0 and 1, and derivations.
Engineering↗
Low-Dimensional Group Cohomology
Explicit descriptions of H^0, H^1 and H_1 for group cohomology, with trivial and non-trivial coefficients, and their interpretations.
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mathematics 387
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Context and scope 42
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template 34
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project leadership 31
project teams 31
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