- Léwy operator
- Lüroth constant
- Lüroth, J.
- Lüroth problem
- Lüroth theorem
- L’Hospital cubic
- L’Hospital, G.F.A.
- L’Hospital rule
- L’Huilier formula
- L’Huilier problem
- L’Huilier theorem
- L’Huilier (或 L’Huillier), S.-A.-J.
- L⍥wenheim, L.
- L⍥wenheim-Skolem-Tarski theorem
- L⍥wenheim-Skolem theorem
- L⍥wner, K.(即Loewner, C.)
- Maak, E.A.W.
- Macaulay, F.S.
- Macaulay local ring
- Macaulay ring
- MacBeath, A. M.
- MacBeath circle
- MacBeath circumconic
- MacBeath ellipse
- MacBeath inconic