Liu, Yu-Ru
- University of Waterloo, Ontario. Analytic number theory; Probabilistic number theory; Elliptic Curves; Circle method; Function fields.
- http://www.math.uwaterloo.ca/PM_Dept/Homepages/Liu/liu.shtml

Lalin, Matilde
- Institute for Advanced Study, Princeton. Mahler measure. Preprints, publications, talks.
- http://www.math.ias.edu/~mlalin/

Lozano-Robledo, Alvaro
- Cornell University, USA. Algebraic number theory: Class numbers and Elliptic curves. Publications, articles, elliptic curve tables and Pari code.
- http://www.math.cornell.edu/~alozano/

Labute, John
- McGill University. Lie algebras and central series of groups, infinite Galois theory and pro-p-groups. Publications.
- http://www.math.mcgill.ca/labute/

Ling San
- Nanyang Technological University, Singapore. Applications of number theory to cryptography, coding theory and combinatorial designs.
- http://www.ntu.edu.sg/home/lingsan/

Lauder, Alan
- University of Oxford. Algorithmic number theory, with an emphasis on problems related to multivariate polynomials over finite fields.
- http://www.maths.ox.ac.uk/~lauder/

Lagarias, Jeffrey C.
- University of Michigan. Computational Complexity Theory, Cryptography, Diophantine Approximation, Discrete and Computational Geometry, Dynamical Systems, Harmonic Analysis; Mathematical Physics, Optimization, Number Theory. Publications, courses.
- http://www.math.lsa.umich.edu/~lagarias/

Lindenstrauss, Elon
- Ergodic theory, dynamical systems, and their applications to number theory. Publications.
- http://www.math.princeton.edu/~elonl/

Long, Ling
- Iowa State University. Modular forms for non-congruence subgroups; Modularity of elliptic and K3 surfaces; Arithmetic of Calabi-Yau varieties and applications.
- http://orion.math.iastate.edu/linglong/

Leibman, Alexander
- Ohio State University. Combinatorial number theory. Preprints.
- http://www.math.ohio-state.edu/~leibman/

Lemurell, Stefan
- Chalmers University of Technology / Goteborg University. Automorphic forms. Publications, tables of Maass forms.
- http://www.math.chalmers.se/~sj/

Lemmermeyer, Franz
- Bilkent University. Algebraic number theory, elliptic curves. Papers, lecture notes, texts.
- http://www.fen.bilkent.edu.tr/~franz/

Lapid, Erez
- Hebrew University of Jerusalem. Automorphic forms, representation theory, trace formula.
- http://www.ma.huji.ac.il/~erezla/