theorem 15.51 Factorisation of invariant forms

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theorem 15.51: Factorisation of invariant forms15.51definition 15.3: Tensor product Lie algebra15.3corollary 15.70: Signature of the factorised form15.70example 15.57: k=2 recovers the Killing form15.57proposition 15.55: Completeness fails for k\ge315.55theorem A.64: Completeness of the factorised bilinear formsA.64theorem 15.53: The factorised forms are exactly the balanced ones15.53theorem 15.58: Nondegeneracy on a resonant subalgebra15.58proof : ch:13-lie-algebra-expansions@proof-30proofdefinition 15.52: Balanced form15.52definition 15.14: Truncated polynomial algebra and Takiff algebra15.14example 15.61: Maurer–Cartan expansion15.61proposition 15.6: Functoriality15.6proposition 15.41: Resonance, general form15.41proposition 15.7: Ideals of A become ideals of g_A15.7proposition 15.8: The radical of A is solvable in g_A15.8proposition 15.60: Semigroup expansion15.60proposition 15.15: Takiff brackets15.15theorem 15.13: Classification of g_A by the algebra15.13theorem 15.54: Completeness in the bilinear case15.54theorem 15.29: The three constant-curvature kinematics, in every dimension15.29theorem 15.10: Factorisation of the Killing form15.10theorem 15.4: The construction produces a Lie algebra15.4definition 15.66: Gram form of a functional15.66proof : ch:13-lie-algebra-expansions@proof-39proofproof : ch:13-lie-algebra-expansions@proof-32proofdefinition A.62: Absolutely simpleA.62equation 15.2: eq:exp-bracket15.2lemma A.63: The invariant bilinear forms of an absolutely simple algebra form a lineA.63lemma 15.50: Every k-trace comes from a linear functional15.50proof : app:A-long-proofs@proof-49proofproof : ch:13-lie-algebra-expansions@proof-31proofdefinition 15.20: Resonant subalgebra15.20lemma 15.19: A grading is an involution, and the Killing form respects it15.19corollary 15.69: No positive pairing survives the radical15.69remark 15.59: The central charge is what makes the form work15.59proof : ch:13-lie-algebra-expansions@proof-33proof

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typedirectionnode provenancewhere
depends_on Tensor product Lie algebra declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:1975
depends_on Signature of the factorised form declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:2617
depends_on $k=2$ recovers the Killing form declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:2188
depends_on Completeness fails for $k\ge3$ declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:2103
depends_on Completeness of the factorised bilinear forms declared appendices/A-long-proofs.tex:4215
depends_on The factorised forms are exactly the balanced ones declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:2029
depends_on Nondegeneracy on a resonant subalgebra declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:2200
proves ch:13-lie-algebra-expansions@proof-30 declared parts/02-mathematical-methods/13-lie-algebra-expansions.tex:1978