Lauder, Alan  
   University of Oxford. Algorithmic number theory, with an emphasis on problems related to multivariate polynomials over finite fields.
   http://web.comlab.ox.ac.uk/oucl/work/alan.lauder/

Ling San  
   National University of Singapore. Applications of number theory to cryptography, coding theory and combinatorial designs.
   http://www.math.nus.edu.sg/%7Ematlings/

Logan, Adam  
   University of Liverpool. Algebraic number theory and elliptic curves; the Brauer-Manin obstruction to rational points on surfaces; Iwasawa theory.
   http://www.liv.ac.uk/~adaml/

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

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

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

Li Daxing  
   Shandong University. The Goldbach conjecture; Cryptography and computer science
   http://www.prime.sdu.edu.cn/third/01lidaxing.html

Liu Jianya  
   Shandong University. Additive number theory; Automorphic forms; L-functions.
   http://www.prime.sdu.edu.cn/third/02liujianya.html

Lim Chong Hai  
   National University of Singapore. Algebraic number theory.
   http://www.math.nus.edu.sg/~matlimch/

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

Lindenstrauss, Elon  
   Courant Institute of Mathematical Sciences, New York University. Ergodic theory, dynamical systems, and their applications to number theory. Publications.
   http://www.math.nyu.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/