Formulas
- Littlewood conjecture
- Littlewood polynomial
- Littlewood subordination theorem
- Littlewood–Offord problem
- Lowest common denominator
- Lubell–Yamamoto–Meshalkin inequality
- Lucas sequence
- Lucas–Lehmer primality test
- Mittag-Leffler function
- Modular lambda function
- Strong law of small numbers
- Lumer–Phillips theorem
- Lusin's theorem
- Luzin N property
- Lyndon word