Formulas
- Linearization
- Linearly disjoint
- Linearly ordered group
- Link (knot theory)
- Link concordance
- Linking number
- Lions–Lax–Milgram theorem
- Lions–Magenes lemma
- Liouville's theorem (differential algebra)
- Liouville surface
- Liouville–Bratu–Gelfand equation
- Liouville–Neumann series
- Liouvillian function
- Lipschitz domain
- List (abstract data type)