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 Nov 8 awarded Popular Question Jul 15 awarded Citizen Patrol Sep 24 awarded Autobiographer Sep 22 awarded Critic Oct 18 revised Moment of inertia of rotating particles in center of mass frame? attempted clarification Oct 18 comment Moment of inertia of rotating particles in center of mass frame? Either that or find if/how I can use non-reduced rotation in the 'normal' reduced representation Oct 17 comment Moment of inertia of rotating particles in center of mass frame? I want to know for the individual molecules. So do I understand correctly that I just use the same formula and mass as I would in lab frame? It seems weird because the reduced mass of the molecule is different... Oct 17 revised Moment of inertia of rotating particles in center of mass frame? sorry for typos Oct 17 asked Moment of inertia of rotating particles in center of mass frame? Jan 24 awarded Teacher Jan 24 awarded Scholar Jan 24 accepted Commutator with exponential $[A, \exp(B)]$ Jan 24 awarded Student Jan 24 comment Commutator with exponential $[A, \exp(B)]$ Sorry, what I meant was an expression without infinite sum. E.g. with an expontentiation. Is it reducable to something like that? Jan 24 awarded Supporter Jan 24 awarded Custodian Jan 24 comment Commutator with exponential $[A, \exp(B)]$ Thanks! Is there an expression for $[A, \exp(B)]$ if $[A, B]$ isn't 0? Jan 23 reviewed Approve Commutator with exponential $[A, \exp(B)]$ Jan 23 awarded Editor Jan 23 revised Commutator with exponential $[A, \exp(B)]$ added 29 characters in body