The exponential of an operator gives the exponential mapping H↦exp(H)=∑Hᵏ/k! of the space of Hamiltonian operators to the symplectic group. The symplectic group acts by conjugation on itself and on its Lie algebra.

Oh, so that's how it works.

Well, I confess my forgetfulness; but what historian, who ever gets free from mere antiquarism, can help forgetting? A modern realism surely does no greater violence to history than antiquarism.

She gave birth to dicephalous conjoined twins