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Nov
24
asked Number of nodes on diagonal planes of a cube
Nov
9
answered About a weighted sum of hitting times for random walks on graphs
Nov
3
comment Chinese remainder theorem
How do you justify the second sentence?
Nov
3
comment Chinese remainder theorem
I have added it. Please let me know if it's correct.
Nov
3
answered Chinese remainder theorem
Nov
3
comment Chinese remainder theorem
Yes, I will add it as a solution.
Nov
3
accepted Chinese remainder theorem
Nov
3
revised Chinese remainder theorem
Forgot a condition
Nov
3
comment Chinese remainder theorem
I will update the question. (This problem is a part of a larger problem and I forgot the conditions that I'd used.)
Nov
3
asked Chinese remainder theorem
Oct
28
accepted What is an example of a lambda-system that is not a sigma algebra?
Oct
28
comment What is an example of a lambda-system that is not a sigma algebra?
Even though both answers are correct, I'm going to mark this answer because it gives me a bit of intuition about what's going. The other answer would have been a better solution to an exam question.
Oct
28
comment What is an example of a lambda-system that is not a sigma algebra?
I think you only need relative complement of included sets? I.e., $A \subseteq B \Rightarrow B \setminus A \in L$.
Oct
28
asked What is an example of a lambda-system that is not a sigma algebra?
Sep
21
comment Example where union of increasing sigma algebras is not a sigma algebra
Not to me :) But, even if I were one of your students, I don't think this question goes beyond what students would discuss between themselves.
Sep
21
accepted Why are the sets of rational and irrational numbers Borel sets (over the reals)?
Sep
21
awarded  Commentator
Sep
21
comment Why are the sets of rational and irrational numbers Borel sets (over the reals)?
Thank you very much; I see it now.
Sep
21
comment Why are the sets of rational and irrational numbers Borel sets (over the reals)?
@Qiaochu, I see it now.
Sep
21
asked Why are the sets of rational and irrational numbers Borel sets (over the reals)?