J Kasahara

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80 reputation
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visits member for 1 year, 6 months
seen Jan 1 '13 at 18:58

Dec
13
comment Question about definition of Semi algebra
@Alex: I did the "accept the answer" because I'm sure your answer is correct. Thank you for the reference. I looked but I am still confused about one thing.. As you say we can write $X \backslash A_1$ as a finite union of sets in the semialgebra $S$, but $S$ is not closed under finite unions so I just can't see how intersecting it with $A_2 \in S$ gets us a set in $S$. Are we assuming extra condition here by any chance? I would greatly appreciate if you could possibly explain this minor detail. Thank you very much.
Dec
13
accepted Question about definition of Semi algebra
Dec
12
awarded  Commentator
Dec
12
comment Question about Borel sets
Thank you for your answer!
Dec
12
accepted Question about Borel sets
Dec
12
comment Question about Borel sets
Thank you for your answer!
Dec
12
comment Question about Borel sets
Thank you for your answer!
Dec
12
comment Question about definition of Semi algebra
Hi, I am just having trouble understanding why $B_2$ has to be in the semi algebra... Could you possibly explain it a bit more?
Dec
11
asked Question about Borel sets
Dec
11
asked Question about definition of Semi algebra
Dec
6
awarded  Tumbleweed
Nov
30
accepted Simple Application of Prime Number Theorem
Nov
30
comment Simple Application of Prime Number Theorem
Ooopps. I guess it's not simple after all. Thank you very much!
Nov
30
asked Simple Application of Prime Number Theorem
Nov
30
comment A certain product over primes
Thank you very much!
Nov
30
accepted A certain product over primes
Nov
30
comment A certain product over primes
Thank you very much for the computation!
Nov
30
asked A certain product over primes
Nov
11
comment An integral question
Thank you very much!
Nov
11
accepted An integral question