Talk:Rotational invariance

Application to Quantum Mechanics
If Rotation does not depend explicitely on time, and the rotation operator is
 * $$R=1+J_z d\theta$$ ,

then, $$J_z$$ does not depend explicitely on time. Why is it necessary to go through all the commutator computations? —Thurth (talk) 06:44, 24 March 2009 (UTC)

Conformal invariance
Is rotational invariance related to conformal invariance? Article doesn't say.