query: How many $\sigma$-algebras on a $4$-element set $X$?
positive_passages.docid: 153306
positive_passages.text: Number of sigma algebras for set with 4 elements
negative_passages.docid: 110832
negative_passages.text: $F_\sigma$-subsets in a normal space can be separated
negative_passages.docid: 68512
negative_passages.text: $\sigma$ algebra of collection of random variables
negative_passages.docid: 89990
negative_passages.text: Direct limit of arbitrary family of tensor products of A-algebras
negative_passages.docid: 84132
negative_passages.text: Number of preimages of a group element under a homomorphism.
negative_passages.docid: 96892
negative_passages.text: Number of Non-isomorphic models of Set Theory
negative_passages.docid: 64582
negative_passages.text: Group covered by finitely many cosets
negative_passages.docid: 141984
negative_passages.text: Find the number of homomorphisms between $\mathbb{Z}_m$ and $\mathbb{Z}_n$
negative_passages.docid: 92822
negative_passages.text: Finite number of elements generating the unit ideal of a commutative ring
negative_passages.docid: 103427
negative_passages.text: When is $\operatorname{Hom}_A(M,N)$ finitely generated?
negative_passages.docid: 28402
negative_passages.text: Number of bases of an n-dimensional vector space over q-element field.
negative_passages.docid: 99999
negative_passages.text: A question on identifying normal subgroups of $S_4$
negative_passages.docid: 33894
negative_passages.text: How many chains are there in a finite power set?
negative_passages.docid: 137621
negative_passages.text: The Number of Topologies on a Finite Set
negative_passages.docid: 146969
negative_passages.text: Proving that every group of order $4$ is isomorphic to $\Bbb Z_4$ or $\Bbb Z^*_8$
negative_passages.docid: 142038
negative_passages.text: Finding the number of elements of order two in the symmetric group $S_4$
negative_passages.docid: 141379
negative_passages.text: All groups where underlying set has at most 4 elements