def IsPosSemidef (R : Fin N → Fin N → ℝ) : Prop := ∀ v : Fin N → ℝ, 0 ≤ ∑ i, ∑ j, R i j * v i * v j
thesis/CESProofs/Dynamics/Defs.lean:118
Core definitions for the Lean formalization of Paper 3: