`BookProof.QuantumGravityBrstCharge.linGen_prod` (A B : Matrix (Fin d) (Fin d) ℝ) : linGen A * linGen B = ∑ j, ∑ k, ∑ l, ∑ m, (A j k * B l m) • (elemGen j k * elemGen l m)

Initializing...

`BookProof.QuantumGravityBrstCharge.linGen_prod` (A B : Matrix (Fin d) (Fin d) ℝ) : linGen A * linGen B = ∑ j, ∑ k, ∑ l, ∑ m, (A j k * B l m) • (elemGen j k * elemGen l m) · Prove2Me