Cardinality of all equivalence relations on N
89167
Cardinality of equivalence relations in $\mathbb{N}$
8627
Number of equivalence classes of $w \times h$ matrices under switching rows and columns
62455
Prove Equivalence Relation in G
39880
Cardinality of Orderings of $\mathbb{R}$
132537
Class of sets of a given infinite cardinality
122506
Relation on countable sets
104977
How to calculate equivalence relations
79568
Cardinality of the set $D$
108957
Cardinality of a totally ordered union
44214
The number of subsets of a set of cardinality $n$
156006
Cardinality of set containing all infinite subsets of $\mathbb{Q}$
69043
The equivalence relation generated by a relation
67451
Building a bijection from a finite union of countable sets to $\mathbb{N}$
150857
Equivalence relations on S given no relation?
136883
The class of equivalence.
20085
What's the cardinality of all sequences with coefficients in an infinite set?
20736
Prove the relation $R$ in $N \times N$ defined by $(a,b) \simeq (c,d)$ iff $ad=bc$ is an equivalence relation.