A edit
B edit
C edit
D edit
E edit
F edit
G edit
H edit
I edit
K edit
L edit
M edit
N edit
O edit
P edit
Q edit
- q-analog
- q-binomial theorem—see Gaussian binomial coefficient
- q-derivative
- q-series
- q-theta function
- q-Vandermonde identity
R edit
S edit
- Schröder number
- Search algorithm
- Sequences with zero autocorrelation function
- Series-parallel networks problem
- Set cover problem
- Shuffling puzzle
- Small set (combinatorics)
- Sparse matrix, Sparse array
- Sperner family
- Sperner's lemma
- Stable marriage problem
- Steiner system
- Stirling number
- String algorithm
- Straddling checkerboard
- Subsequence
- Subset sum problem
- Symmetric functions
- Szemerédi's theorem
T edit
U edit
- Union-closed sets conjecture
- Urn problems (probability)