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Definition

Complete Reducibility

Lie Groups and Lie Algebras · lie-groups.tex
A representation $V$ (Definition~Group Representation) is completely reducible (semisimple) if it decomposes as a direct sum (Definition~Direct Sum of Representations) of irreducible subrepresentations (Definition~Irreducible Representation, Definition~Subrepresentation).
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flowchart LR classDef current fill:#6366f1,color:#fff,stroke:#4f46e5 nca6bd350["Representation"] n36d19f67["Direct Sum of Representations"] nc8a0881e["Irreducible Representation"] n45f1bf4d["Subrepresentation and Invariant Subspace"] na4ca6986["Complete Reducibility"]:::current n692f1650["Maschke's Theorem for Compact Groups"] nca6bd350 --> na4ca6986 n36d19f67 --> na4ca6986 nc8a0881e --> na4ca6986 n45f1bf4d --> na4ca6986 na4ca6986 --> n692f1650 click nca6bd350 "../objects/ca6bd350.html" "_self" click n36d19f67 "../objects/36d19f67.html" "_self" click nc8a0881e "../objects/c8a0881e.html" "_self" click n45f1bf4d "../objects/45f1bf4d.html" "_self" click n692f1650 "../objects/692f1650.html" "_self"