Formulas
- Klein–Gordon equation
- Klein–Kramers equation
- Kneser graph
- Knuth–Bendix completion algorithm
- Kolmogorov–Zurbenko filter
- Kontsevich quantization formula
- Koorde
- Korn's inequality
- Kosambi–Karhunen–Loève theorem
- Kosaraju's algorithm
- Kullback–Leibler divergence
- Merge algorithm
- Merge sort
- Meridian arc
- Mermin–Wagner theorem