John Cook (regicide) that was seen as symbolising the divine monarch bowing before human law. As a regicide, Cook was excluded after the Restoration of Charles II from the Indemnity and Oblivion Act which indemnified most opponents of the Monarchy for crimes they might have committed during the Civil War and Interregnum (1642–1660). The memoirs of Edmund Ludlow give an account of Cook's trial and his public execution the next day. Thus, John Cook was tried and found guilty of high treason for his part in the trial of Charles I. He was hanged, drawn and quartered with the radical preacher Hugh Peters
Conformal Killing equation Conformal Killing equation In conformal geometry, the conformal Killing equation on a manifold of space-dimension "n" with metric formula_1 describes those vector fields formula_2 which preserve formula_1 up to scale, i.e. for some function formula_5 (where formula_6 is the Lie derivative). Vector fields that satisfy the conformal Killing equation are exactly those vector fields whose flow preserves the conformal structure of the manifold. The name Killing refers to Wilhelm Killing, who first investigated the Killing equation for vector fields that preserve a Riemannian metric. By taking the trace we find that necessarily formula_7. Therefore we can write the conformal Killing