168theorem coshRemainder_zero : coshRemainder 0 = 0 := by
proof body
Term-mode proof.
169 unfold coshRemainder 170 simp 171 172/-! ## §4. Decomposition: exact = linearized + quartic remainder -/ 173 174/-- The quartic remainder of the full action (the "non-linear 175 correction" to the weak-field Laplacian). It vanishes on the 176 flat vacuum and is `O(|ε|⁴)` for small `ε`. -/
depends on (14)
Lean names referenced from this declaration's body.