Is it possible to count the number of Set bits in Number in O(1)?
9560
How to count the number of set bits in a 32-bit integer?
2935
Completness and Set of Result of One Set ?!?
136848
Find the number of nonzero elements
146234
Count the number of n-bit strings with an even number of zeros.
64658
How many associative binary operations for a set of two elements?
14073
Is there a way to determine how many digits a power of 2 will contain?
70327
the numer of partial function between two sets in combinatoric way
8645
A formula for bit strings with no $k$ consecutive $1$'s using generating functions
158708
Counting the adjacent swaps required to convert one permutation into another
28453
Finding all partitions of a set
71902
How to define binary operation on arbitrary set in order to create a group structure.
106397
Counting ways to partition a set into fixed number of subsets
128885
For 3 numbers represented with $n$ bits in binary, how many bits is required for their product.
127123
Cardinality of power set and binary sequence
19646
How many bits are in a qubit?
18308
Coset multiplication giving a well defined binary operation
114927
How to implement Bitcount using only Bitwise operators?