140 reputation
8
bio website
location Liverpool, United Kingdom
age 22
visits member for 1 year, 2 months
seen Mar 20 at 18:10

Undergraduat maths student.


Mar
13
comment How to understand this equation for brownian motion
the expected density at x at time t+$\tau$ ?
Mar
13
comment How to understand this equation for brownian motion
@TheBridge yes, I think you're correct. I think this is expectation, I kinda figure it out.
Mar
12
comment Learning about the gamma function.
try google 'gamma function introduction pdf'
Feb
27
comment A filtration with usual condition if the process is Càdlàg
@Did you sound like my tutor, yes its a homework and I have no idea, actually I want to delete this problem coz I suspect the problem is flaw..
Feb
27
comment Show $L$ is not a stopping time
Thanks guys, I did miss something I think is not so important, which is $B \in \mathcal B$, and in a book it said L is not a stopping time unless $A$ is freaky. Thats all the information it provided. And I am not so sure what 'freaky' means here.
Feb
26
comment Show $L$ is not a stopping time
@GEdgar Thanks, your interpretation is really good, and I have noticed this problem, I just dont know how to write the proof.
Feb
18
comment Stuck on a relatively easy probability problem
Let's say 5 questions team D able to answer are question 1 to 5. The exam paper only contains 3 questions, then the problem becomes choose 3 questions from 20 that belongs to question 1 to 5.
Feb
10
comment how to compute this expectation value
is that derivative should be differentiated under t not x?
Feb
10
comment how to compute this expectation value
I have very limited experience for gamma function, could you give more detail how to do this trick?
Feb
9
comment Generalized Hölder inequality, the case when equality holds
for two functions $f,g$ , $p^{-1} + q^{-1}= 1$,and $f \in \mathcal L^p (\mu), g\in \mathcal L^q (\mu)$. Then the equality holds iff ${|f|^p \over ||f||_p^p}={|g|^q \over ||g||_q^q} a.e.$, hope this is helpful
Feb
9
comment How to work out this integral
@D.L. yes, thank you, i correct it
Feb
9
comment How to work out this integral
yes, but I only know when its double integral you can change it to polar coord.
Jan
28
comment How to calculate that series
@imranfat sorry I correct that
Jan
12
comment Prove this RV converges in probability
@Lost1 oops.... sorry i corrected it
Oct
14
comment Help me Verifying that the equation is integrable and finding its solution
you could add tags (differential)geometry or curves
Oct
13
comment The definition of Borel sigma algebra
yeah, i think i still dont know how can you make sure that b is close enough to y, that there wont be other irrationals between them...
Oct
13
comment The definition of Borel sigma algebra
could you please explain it a bit in detail?
May
10
comment Definition of product measure
yes, i dont know how is that integral come from
May
10
comment Definition of product measure
@MichaelGreinecker sorry, what is unclear here? The definition or my qustion?
Mar
11
comment How to prove the limsup equals liminf for a monotone class.
@BrianM.Scott yeah, i updated it