Why isn't minimal sigma-algebra simply the set containing all countable unions and complements
103307
Generate the smallest $\sigma$-algebra containing a given family of sets
9762
Why do we need sigma-algebras to define probability spaces?
146261
Difference between topology and sigma-algebra axioms.
128118
Is the cofinite topology on a countable set first countable?
70143
Mutually exclusive countable subsets of a countable set
146006
Uncountable $\sigma$-algebra
83830
Sigma algebra generated by the set of all singletons
134983
Borel sigma algebra not containing all subsets of $\mathbb{R}$?
74720
Is every set of measure zero countable?
147783
Showing a sigma algebra is the union of certain collection of sigma algebras
81509
The cardinality of a countable union of countable sets, without the axiom of choice
146951
Every countably generated sigma algebra is generated by a random variable
16892
Reference request: product Borel $\sigma$-algebra of non-separable metric spaces
10247
What is the minimum $ \sigma$-algebra that contains open intervals with rational endpoints
19414
Uncountable subset with uncountable complement, without the Axiom of Choice
78256
Finite additivity in outer measure
62687
Proving Cardinality of Cosets in Abstract Algebra