Confusion in how to find number of onto functions if two sets are given
85658
Number of onto functions
11849
Size of a union of two sets
151316
Is PHP's count() function O(1) or O(n) for arrays?
49592
Show that, if $f:A\to B$ is a function, with $A$ and $B$ being finite sets, and $|A|=|B|$, then $f$ is one to one iff $f$ is onto.
36254
how many semantically different boolean functions are there for n boolean variables?
90566
There exists surjections from A onto B and vice versa, and there is no bijection between the sets?
150210
Finding total number of multi-sets
106325
Question about Cardinality
42942
Finding the number of analytic functions which vanish only on a given set.
20973
How can I find all the subsets of a set, with exactly n elements?
144821
Number of ordered pairs of subsets
102592
Arbitrary Set A a Function??
134050
Question about set notation: what does $]a,b[$ mean?
1627
Cartesian product of an arbitrary number of sets
44214
The number of subsets of a set of cardinality $n$
1643
Number of reflexive relations defined on a set A with n elements
132605
Finding the number of subsets of a set such that an element divides the succeeding element.