Count Subsets of size less than equal to k
24036
extended stars-and-bars problem(where the upper limit of the variable is bounded)
107614
Partitioning an infinite set
110856
Number of ways to select $K$ people from $N$ people such that at least $r$ people are there in between them
45485
Dimension of a subset
1409
Proving that the given set has at most $2^{n-1}$ elements
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 $
55482
Eliminate from list of sets those that are equal (except for the order)
132025
Is there an alternative to Cantor's cardinalities that makes proper subsets smaller than their sets?
73345
maximum size of a $k$-intersecting family of $[n]$
11967
number of subsets of even and odd
102510
Count number of subsets of 3 elements either disjoint or whose intersection is a singleton
35043
Cardinality of a set A is strictly less than the cardinality of the power set of A
117434
Counting integer partitions of n into exactly k distinct parts size at most M
98850
A positional number system for enumerating fixed-size subsets?
7785
Cardinality of sum-set
41192
Neatest proof that set of finite subsets is countable?
41899
Notation for: all subsets of size 2