Combinations of bijective derangement functions
13190
Rearranging people so that no one is in the same spot
125811
Recognizing special cases of a defined function for permuted arguments
46971
Number of surjections from $\{1,...,m\}$ to $\{1,...,n\}$
44879
Multiplicative inverse questions
143051
Inverting noninvertible elements in a bigger ring.
40858
Multiplicative nature of the separability degree
132907
The inverse of a bijective holomorphic function is also holomorphic
120748
Combination With Finite Replacements
25576
Characterization of short exact sequences
23125
Prove that there is a bijection between the set of all subsets of $X$, $P(X)$, and the set of functions from $X$ to $\{0,1\}$.
113594
Convex combination of quasiconvex functions.
41448
Counting set for generating functions
126025
Computing the inverse of a permutation
54761
Inverting the Cantor pairing function
113109
Showing that a map is bijective and finding its inverse
70266
1-1 correspondence between [0,1] and [0,1)
15920
Derangements with repetitive numbers