Neil G
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 Nov3 asked Chinese remainder theorem Oct28 accepted What is an example of a lambda-system that is not a sigma algebra? Oct28 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. Oct28 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., $A \subseteq B \Rightarrow B \setminus A \in L$. Oct28 asked What is an example of a lambda-system that is not a sigma algebra? Sep21 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. Sep21 accepted Why are the sets of rational and irrational numbers Borel sets (over the reals)? Sep21 awarded Commentator Sep21 comment Why are the sets of rational and irrational numbers Borel sets (over the reals)? Thank you very much; I see it now. Sep21 comment Why are the sets of rational and irrational numbers Borel sets (over the reals)? @Qiaochu, I see it now. Sep21 asked Why are the sets of rational and irrational numbers Borel sets (over the reals)? Sep21 accepted Example where union of increasing sigma algebras is not a sigma algebra Sep21 asked Example where union of increasing sigma algebras is not a sigma algebra Sep15 accepted Why do lambda and pi go together? Sep14 revised Sufficient statistics vs. Bayesian sufficient statistics added 20 characters in body; added 9 characters in body; added 27 characters in body Sep14 comment Sufficient statistics vs. Bayesian sufficient statistics Your factorization is right. However, to comment on why the RHS does not depend on $\theta$: the formula is saying that $\theta$ provides no additional information beyond $t$. Sep14 answered Sufficient statistics vs. Bayesian sufficient statistics Sep14 asked Why do lambda and pi go together? Aug28 revised Beta function derivation simpler Aug28 awarded Scholar