Number of sets in equality of union of more than three sets
106756
Union and Intersection of Sets $A_{i}$ and $B_{j}$
146664
The union of two linearly independent subsets
105886
A question on the proof of 14 distinct sets can be formed by complementation and closure
82207
Number of Pairs of Subsets
88628
Proving the total number of subsets of S is equal to $2^n$
36789
The power set of the intersection of two sets equals the intersection of the power sets of each set
124237
Group equals union of three subgroups
114262
Find the cardinality of the following set $S_n=\{(x,y)|x^2+y^2=n, \text{where }x,y,n \in \mathbb Z\text{ and }n\geq0 \}$
147484
For a set with N members, what is the number of set partitions in which each subset is either of size 1 or 2?
9850
How many ways are there to choose 3 subsets $A,B,C$ of a set $\{1,2,3...n\}$ such that $ A \cap B \cap C = \emptyset $
140044
A set union find algorithm
135698
Count subsets whose cardinalities are congruent to 0, 1 and 2 modulo 3 respectively
29232
Find total number of relations that are equivalence as well as partial order set
55482
Eliminate from list of sets those that are equal (except for the order)
95378
Known bounds for the number of groups of a given order.
146098
Number of nonempty subsets of a set with $n$ elements
11849
Size of a union of two sets