Might summon
@Polymath257 to tell me definitively (if I don’t hear back from classmates on Slack) if a notation for quantum operators and eigenbases (eigenbasises?) from my book is the same thing as from a problem I’m working on, because of all the things to trip me up, a stupid notation difference between authors is the most annoying
Edit: I need to just write exp[i f(A)] in Dirac notation, A is a Hermitian operator whose values are known
Edit 2: derp is it legal to expand the exp as a series in Dirac notation? Did I mention I hate Dirac notation and it’s been years since undergrad QM, or linear algebra for that matter? I need to sleep.
These are my dumb notes, which don’t render well on a phone.