16,790 reputation
43189
bio website tancast.com/wp-content/…
location
age
visits member for 3 years, 3 months
seen 9 hours ago

Oct
25
comment Radon Nikodym derivative proof
@t.b.: OK. I can't go to the library right now but I'll try to find it online...
Oct
25
comment Radon Nikodym derivative proof
@t.b.: You said "of informative value $0$" -- is this not a correct answer? I think using Riesz there is nothing left to show. Is this wrong?
Oct
25
revised Radon Nikodym derivative proof
added 417 characters in body
Oct
25
comment Radon Nikodym derivative proof
@t.b.: I posted my tentative answer below... thanks for your help!
Oct
25
comment Radon Nikodym derivative proof
@MichaelHardy: Thanks!
Oct
25
comment Mean ergodic theorem
Thank you. I thought you might leave me to it because it's homework and then I started to panic because I have to hand it in by tomorrow and I still didn't really know what I was doing.
Oct
25
accepted Mean ergodic theorem
Oct
24
asked Radon Nikodym derivative proof
Oct
24
comment Mean ergodic theorem
@t.b.: I would like to show for $x \in I^\bot$ $\forall a_\bot \in A^\bot: \langle x, a_\bot \rangle = 0$. And to do that I was thinking of decomposing $x = a_\bot^\prime + a_{\bot \bot}^\prime$-- am I on the right track?
Oct
24
comment Mean ergodic theorem
@t.b.: Doh! I wasn't aware of this equality. You're truly helpful, as always. Thank you!
Oct
24
asked Mean ergodic theorem
Oct
24
comment Two questions regarding formal proofs
Thanks! And what about $T \vdash \varphi$ and then $T \cup \varphi \vdash$?
Oct
24
asked Two questions regarding formal proofs
Oct
23
comment A question about the deduction theorem
@boumol: This? $\{ \exists y (x = y) \} \vdash \forall x \exists y ( x = y)$ and then $\vdash \exists y (x = y) \rightarrow \forall x \exists y (x = y)$? I think that's not a counter example...
Oct
23
revised A question about the deduction theorem
deleted 148 characters in body
Oct
23
comment A question about the deduction theorem
@ChrisEagle: True! I'll delete it seeing as it's not relevant for my question.
Oct
23
comment A question about the deduction theorem
It could be an axiom but I wrote it as an example of the kind of example I'm looking for.
Oct
23
asked A question about the deduction theorem
Oct
20
comment How can I learn to “read maths” at a University level?
I think you might want to try a tutor. I mean, it doesn't have to be one that you have to pay. Why can't you ask one of your classmates to help you out? The mountain to climb might turn into a tiny hill.
Oct
19
comment Understanding change of variable in measure spaces
@t.b.: the answer to "why exactly?": because $T$ preserves measure?