In how many steps is it necessary to construct the Borel $\sigma$-algebra?
134768
Borel hierarchy doesn't "collapse" before $\omega_1$
87203
Preimage of generated $\sigma$-algebra
143732
Prove random variable $Y_0$ and $\sigma$-algebra $\mathscr{R}$ are independent.
146951
Every countably generated sigma algebra is generated by a random variable
120442
Prove Borel sigma-algebra translation invariant
83830
Sigma algebra generated by the set of all singletons
139622
Generator of rational functions unchanged under $\sigma(X) = X + 1$
86717
Completeness of $\langle \mathscr{C} [0, 1], \| \cdot \|_1 \rangle$
117185
The union of a strictly increasing sequence of $\sigma$-algebras is not a $\sigma$-algebra
11082
Borel-Cantelli Lemma "Corollary" in Royden and Fitzpatrick
38946
Show that $\{\cup_{n\in K} (n, n+1]: K \subset \mathbb{Z}\}$ is a $\sigma$-algebra on $\mathbb{R}$
89787
Borel-Cantelli lemma problem
104308
Proving a set is a Sigma Algebra
10247
What is the minimum $ \sigma$-algebra that contains open intervals with rational endpoints
103307
Generate the smallest $\sigma$-algebra containing a given family of sets
42358
Find a Borel subset satisfying the condition
36139
Size of a natural transformation and the Yoneda Lemma