- Domenico Angelo La Manna (Università degli studi di Napoli Federico II)
- Camille Labourie (Assistant Professor, University of Lorraine)
- Miklós Laczkovich
- Panu Lahti
- Sajjad Lakzian (Assistant Professor, Isfahan University of Technology)
- Lorenzo Lamberti (PhD student, University of Salerno)
- Jimmy Lamboley (Associate Professor, Université Paris-Dauphine)
- Tobias Lamm (Associate Professor, University of Frankfurt)
- Sergio Lancelotti
- Christopher Larsen (Professor, WPI)
- Paul Laurain
- Tim Laux
- Hugo Lavenant (Assistant Professor, Bocconi University, Milan, Italy)
- Giuliano Lazzaroni (Università di Firenze)
- Van Phu Cuong Le (Post Doc, Institut für Mathematik, Universität Heidelberg)
- Enrico Le Donne (Full Professor, University of Fribourg)
- Antonio Leaci (Full Professor, Dip.Mat.Fis."E.De Giorgi", Univ. del Salento (Lecce))
- Jason Ledwidge (PhD Student, Eberhard Karls Universitat Tubingen)
- Jona Lelmi (PhD Student, University of Bonn)
- Antoine Lemenant (Full Professor, Université de Lorraine (Nancy))
- Giacomo Lenzi (Assistant Professor, Universita' di Salerno)
- Gian Paolo Leonardi (Full Professor, Department of Mathematics, University of Trento)
- Giovanni Leoni (Full Professor, Carnegie Mellon University)
- Antonio Lerario (Associate Professor, Sissa)
- Peter Lewintan (Karlsruhe Institute of Technology)
- Ben Li (post doc, Tel Aviv University)
- Qinfeng Li (associate professor, Hunan University)
- Yi Li (Full Professor, Southeast University)
- Zhenhao Li (PhD student, University bielefeld)
- Zhuolin Li (Postdoc Fellow, SLMath (MSRI))
- Matthias Liero (Weierstrass Institute)
- Silvia Ligabue (Phd student, University of Basel)
- Stefano Lisini (Ricercatore universitario, Università degli Studi di Pavia)
- Pan Liu (Ph.D. Student, Carnegie Mellon University)
- Yichen Liu (Assistant Professor, Dr.)
- Benjamin Lledos (Université de Nîmes)
- Randy Llerena (PhD Student, University of Vienna)
- Rafael Lopez Soriano (Postdoc Researcher, Universidad de Granada)
- Andrew Lorent (Full Professor, University of Cincinnati)
- Jean Louet (Free-lance (hopefully))
- Xin Yang Lu (Assistant Professor, Lakehead University)
- Ilaria Lucardesi (Università di Pisa)
- Danka Lučić (Post Doc., University of Jyväskylä)
- Rami Luisto (Postdoctoral researcher, University of Jyväskylä)
- Luca Lussardi (Politecnico di Torino)