Number of One to One Functions
40486
Number of One-to-One Functions
61
Calculating the total number of surjective functions
85658
Number of onto functions
111990
Continuous function from $(0, 1]$ onto $(0, 1)$?
28425
Constructing a sequence of function
124847
Is the set of surjective functions from $\mathbb{N}$ to $\mathbb{N}$ uncountable?
57938
When do two functions become equal?
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.
24177
Is there a comprehensive list of functions with operator forms?
61782
How to prove that $f(x) = \frac{-2x+1}{(2x-1)^2-1}$ is one-to-one on $(0,1)$?
121993
Prove that $f$ is one-to-one iff $f \circ h = f \circ k$ implies $h = k$.
16687
Number of Equivalence relations of $\{1,2,3\}$
55840
Number of functions from n-element set to {1, 2, …, m}
36254
how many semantically different boolean functions are there for n boolean variables?
83538
Elegant way for element-wise application of a list of functions
65414
One-one analytic functions on unit disc
76889
How do I evaluate several n-th derivatives of a function at one point?