/sci/ - Science & Math

>>9894670
>multiplying by it's inverse
"Multiply" already directly implies the group structure from R* and hence "inverse" here would refers to the inverse in said group, you fucking complete imbecile.
>R^*^+
LMFAO, you do know R_+ is not a group under addition right? The only "inverse" that'd make sense in R_+ is the multiplicative inverse you fucking idiot.
>this is the average /sci/ poster giving you advice
Let this be a warning to all of you clueless freshmen newfriends out there.

>>9293041
It is though. It's a change in coordinate basis to momentum basis. The Fourier kernel is literally [math]\langle x |p \rangle[/math].
Or are you saying you have no idea how infinite dimensional vector spaces work?

>>8521828
This >>8522153. Most algebraists think they're hot shit for proving equalities but they have no idea how complicated the objects analysts deal with are.