structure
definition
def or abbrev
MatrixBridge
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formal statement (Lean)
19structure MatrixBridge where
20 matrix : Matrix (Fin 4) (Fin 4) ℝ := 1
proof body
Definition body.
21
22/-- The Minkowski metric matrix $\eta_{\mu\nu} = \text{diag}(-1, 1, 1, 1)$. -/