Curriculum Vitae

Leslie Saper

Box 90320, Dept. of Mathematics, Durham, NC 27708-0320

+1 919 660 2843 (office)

(email)

Personal: Born: 17 October 1957
Place: West Chester, PA
Citizenship: US

Education

Ph.D.	Princeton University	1984
B.S.	Yale University	1979
M.S.	Yale University	1979

Areas of Research: Locally symmetric varieties, Number theory and automorphic forms,
L²-cohomology and intersection cohomology, Geometrical analysis of singularities

Professional Experience / Employment History

Duke University: Professor, Mathematics, 2005 - present

Associate Profesor, Mathematics, 1988 - 2005

(tenure granted, 1989)

: Assistant Professor, Mathematics, 1986-88

M.I.T.: C. L. E. Moore Instructor, Mathematics, 1984-86

Visiting Positions: Visiting Professor, University of North Carolina, August 2010 - December 2010; Member, Tata Institue for Fundamental Research, December 2005 - February 2006; Member, Institut des Hautes Études Scientifiques, March-April 2000; Visiting Scholar, UCSD, June-August, 1996-97; Hermann Minkowski Gastprofessur, Katholische Universität Eichstätt, May-August 1995; Member, Institute for Advanced Study, 1992-93; Visiting Scholar, UCSD, June-August, 1990-94; Visiting Scholar, Harvard University, 1988-89; Visiting Assistant Professor, University of Illinois at Chicago, 1987-88; Visiting Scholar, UCSD, June-August, 1984-87

Awards, Honors, and Distinctions: Fellow, American Mathematical Society, 0 2013
Inaugural class of Fellows, American Mathematical Society, 0 2012
Invited Address, International Congress of Mathematicians, Kyoto, Japan, August 1990
Invited Address, International Congress of Mathematicians, Kyoto, Japan, August 1990
Alfred P. Sloan Foundation Fellowship, 1989-93
Fellowship, Alfred P. Sloan Foundation, 0 1989
NSF Presidential Young Investigator Award, 1989-95
Presidential Young Investigator Award, NSF, 0 1989
NSF Postdoctoral Research Fellowship, 1987-91
Postdoctoral Research Fellowship, NSF, 0 1987

Major Grant Support: NSF DMS-0502821
NSF DMS-9870162
NSF DMS-9005129
NSF DMS-8957216
NSF DMS-8504029

Conferences Organized: Workshop on Locally Symmetric Spaces, co-organizer with S. Kudla, J. Rohlfs, and B. Speh, May 18, 2008 - May 23, 2008

Professional Service: SPIRE Fellows Advisory Board, October 2, 2017 - present; Mentor for Duke SPIRE Fellows, August 9, 2017 - present; Director of Postdoctoral Training, July 01, 2023 - June 30, 2026; Director of Postdoctoral Training, Director of Postdoctoral Training. Department of Mathematics. July, 2023 - June, 2026, 2023-26; Chair, Chair. Department of Mathematics. July, 2020 - June, 2021, 2020-21; Director of Undergraduate Studies, July 01, 2018 - June 30, 2019; Director of Undergraduate Studies, Director of Undergraduate Studies. Department of Mathematics. 2015 - 2019, 2015-19; Director of Undergraduate Studies, July 01, 2015 - June 30, 2018; AMS Committee on Committees, AMS Committee on Committees. February 01, 2013 - January 31, 2015, February 1, 2013 - January 31, 2015; Associate Chair, July 1, 2009 - June 30, 2010; Associate Chair, Associate Chair. Department of Mathematics. July, 2007 - June, 2010, 2007-10; Associate Chair, July 1, 2007 - June 30, 2009; Workshop on Locally Symmetric Spaces, Workshop on Locally Symmetric Spaces. Co-organizer with S. Kudla, J. Rohlfs, and B. Speh. Banff International Research Station, Banff, Canada. May 18,, May 2008; Arts & Sciences Council, 2004-07; Director of Graduate Studies, Department of Mathematics, Duke University, 2001-03; Director of Graduate Studies, Director of Graduate Studies. Department of Mathematics. 2001 - 2003, 2001-03; Editor, Proceedings of the American Mathematical Society, 1996-2000; Editorial board member, Editorial board member. Proceedings of the American Mathematical Society. 1996 - 2000, 1996-2000; Editorial board member, Editorial board member. Duke Mathematical Journal. 1991 - 1994, 1991-94

Selected Invited Talks: Weights and Singularities, Gerald D. Fischbach Auditorium, New York, 14 August 2018; L₂-cohomology and the theory of weights, CIRM, Luminy, Marseille, France, 14 June 2016; L²-cohomology of projective algebraic varieties, International Conference on Singularity Theory—in Honor of Henry Laufer's 70th Birthday, Tsinghua Sanya International Mathematics Forum, Sanya, China, 20 December 2015; L²-cohomology of projective algebraic varieties, Sanya, China, 20 December 2015; Perverse sheaves on compactifications of locally symmetric spaces, Isaac Newton Institute, Cambridge, England, July 28, 2015; Perverse sheaves and the reductive Borel-Serre compactification, Johns Hopkins University, Baltimore, November 21-23, 2014; Raghunathan's Vanishing Theorem and Applications, Mumbai, India, December 28, 2011; Cohomology of Locally Symmetric Spaces and the Moduli Space of Curves, Germany, June 09, 2011; The congruence subgroup kernel and the reductive Borel-Serre compactification, Algebraic Geometry and Number Theory seminar at John Hopkins University, Baltimore, March 1, 2011; Self-dual sheaves and L²-cohomology of locally symmetric spaces, Hausdorff Center for Mathematics, Bonn, Germany, June 24, 2010; What is ... intersection homology?, University of Michigan, Ann Arbor, February 17, 2009; $\mathscr L$ -modules and the cohomology of locally symmetric spaces, International conference on Représentations des groupes de Lie et applications, Institut Henri Poincaré, Paris, France, December 15, 2008; ℒ-modules and the cohomology of locally symmetric spaces, Institut Henri Poincaré, Paris, France, 15 December 2008; Quadratic Reciprocity from Euler to Langlands, Graduate/faculty Seminar, Duke University, [abstract], September 28, 2007; Geometry and Topology of Locally Symmetric Spaces, Instituto de Matemáticas Unidad Morelia, Morelia, Mexico, January 8, 2007; Cohomology of Locally Symmetric Spaces, International conference and instructional workshop on discrete groups, Morningside Center of Mathematics, Chinese Academy of Science, Beijing, China [slides], July 17 - August 4, 2006; L²-Harmonic Forms on Locally Symmetric Sapces, Tata Institute for Fundamental Research, Mumbai, India, January 19, 2006; L²-cohomology of locally symmetric spaces, Center of Mathematical Sciences at Zhejiang University, China, 27 July 2004; L²-cohomology of locally symmetric spaces, International Conference In Memory of Armand Borel: Algebraic groups, arithmetic groups, automorphic forms and representation theory, Center of Mathematical Sciences at Zhejiang University, China, 26 - 30 July, 2004; Cohomology of compactifications of locally symmetric spaces, The Graduate School of Mathematical Sciences, University of Tokyo, Japan, 16 - 30 December 2003; On the Cohomology of Locally Symmetric Spaces and their Compactifications (two lectures), Harvard University, 15-17 November 2002; The Rapoport-Goresky-MacPherson Conjecture, Johns Hopkins University, 23 March 2001; Rapoport's conjecture on the intersection cohomology of the reductive Borel-Serre compactification, Institut Henri Poincaré, Paris, France, 25 April 2000; L₂-cohomology of Algebraic Varieties, International Congress of Mathematicians, Kyoto, Japan, 23 August 1990

Doctoral Theses Directed: Mingzue (Dena) Z. Ho, Realizing Hecke Actions on Modular Forms via Cohomology of Dessins d′Enfants, (February 19, 2018 - June 1, 2021); Joshua Cruz, Examples of the Local L²-Cohomology of Algebraic Varieties, (April 9, 2015 - April 1, 2020); Oliver Gjoneski, Cohomology of Arithmetic Groups, and Multi-Variable Period Polynomials Associated to Cusp Forms, (January, 2007 - May 15, 2011); Dan Yasaki, On the Existence of Spines for Q-rank 1 Groups, (January 1, 2001 - May 15, 2005); Charles Vuono, The Kodaira Embedding Theorem for Kähler Varieties with Isolated Singularities, (September 1, 1989 - May 31, 1992)

Professional Affiliations: Member: AMS

Publications

Papers Published

Cox, D; Esnault, H; Hain, R; Harris, M; Ji, L; Saito, M-H; Saper, L, Remembering Steve Zucker, edited by Cox, D; Harris, M; Ji, L, Notices of the American Mathematical Society, vol. 68 no. 7 (August, 2021), pp. 1156-1172, American Mathematical Society.
Saper, L, ℒ-modules and micro-support, to appear in Annals of Mathematics (2018).
Saper, L, Perverse sheaves and the reductive Borel-Serre compactification, in Hodge Theory and L²-analysis, edited by Ji, L, vol. 39 (2017), pp. 555-581, International Press.
Ji, L; Murty, VK; Saper, L; Scherk, J, The fundamental group of reductive Borel–Serre and Satake compactifications, Asian Journal of Mathematics, vol. 19 no. 3 (2015), pp. 465-486, International Press of Boston.
Leslie D. Saper, $\mathscr L$ -modules and the conjecture of Rapoport and Goresky-MacPherson, in Formes Automorphes (I) -- Actes du Semestre du Centre Émile Borel, printemps 2000, Astérisque, edited by J. Tilouine, H. Carayol, M. Harris, M.-F. Vignéras, vol. 298 (2005), pp. 319--334, Société Mathématique de France.
Saper, L, ℒ-modules and the conjecture of Rapoport and Goresky-Macpherson, in Formes Automorphes (I) — Actes du Semestre du Centre Émile Borel, printemps 2000, edited by Tilouine, J; Carayol, H; Harris, M; Vignéras, M-F, vol. 298 no. 298 (2005), pp. 319-334.
Saper, L, L²-cohomology of locally symmetric spaces. I, Pure and Applied Mathematics Quarterly, vol. 1 no. 4 (2005), pp. 889-937, International Press of Boston.
Saper, L, Geometric rationality of equal-rank Satake compactifications, Mathematical Research Letters, vol. 11 no. 5 (2004), pp. 653-671, International Press of Boston.
Saper, L, On the Cohomology of Locally Symmetric Spaces and of their Compactifications, in Current developments in mathematics, 2002, edited by Jerison, D; Lusztig, G; Mazur, B; Mrowka, T; Schmid, W; Stanley, R; Yau, S-T (2003), pp. 219-289, International Press (reprinted in Lie Groups and Automorphic Forms, edited by L. Ji, et al., AMS/IP Studies in Advanced Mathematics, vol. 37, 2006.).
Saper, L, Tilings and finite energy retractions of locally symmetric spaces, Commentarii Mathematici Helvetici, vol. 72 no. 2 (January, 1997), pp. 167-201, Research Institute for Mathematical Sciences, Kyoto University.
Saper, L, L²-cohomology of the Weil-Peterson metric, in Mapping Class Groups and Moduli Spaces of Riemann Surfaces Proceedings of Workshops Held June 24-28, 1991, in Göttingen, Germany, and August 6-10, 1991, in Seattle, Washington, edited by Bödigheimer, C-F; Hain, R, vol. 150 , pp. 345-360, Amer. Math. Soc..
Leslie D. Saper and Mark Stern, Appendix to: On the shape of the contribution of a fixed point on the boundary. The case of Q-rank one, by M. Rapoport, in The Zeta Functions of Picard Modular Surfaces, edited by R. Langlands and D. Ramakrishnan (1992), Les Publications CRM, Montréal (pp. 489-491.).
Saper, L, L²-cohomology of Kähler varieties with isolated singularities, Journal of Differential Geometry, vol. 36 no. 1 (1992), pp. 89-161, International Press of Boston.
Saper, L; Stern, M, Appendix to: On the shape of the contribution of a fixed point on the boundary. The case of Q-rank one, by M. Rapoport, in The zeta functions of Picard modular surfaces based on lectures delivered at a CRM Workshop in the spring of 1988, edited by Langlands, R; Ramakrishnan, D (1992), pp. 489-491, Centre De Recherches Mathématiques.
Habegger, N; Saper, L, Intersection cohomology of cs-spaces and Zeeman's filtration, Inventiones Mathematicae, vol. 105 no. 1 , pp. 247-272, Springer Nature.
Saper, L, L₂-cohomology of algebraic varieties, in Proceedings of the International Congress of Mathematicians, August 21-29, 1990, Kyoto, edited by Satake, I, vol. 1 , pp. 735-746, Springer-Verlag.
Saper, L; Zucker, S, An introduction to L²-cohomology, in Several Complex Variables and Complex Geometry, vol. 52, Part 2 , pp. 519-534, Amer. Math. Soc..
Stern, M; Saper, L, L²-cohomology of arithmetic varieties, Annals of Mathematics, vol. 132 no. 1 , pp. 1-69, JSTOR.
Saper, L; Stern, M, L²-cohomology of arithmetic varieties, Proc Natl Acad Sci U.S.A., vol. 84 no. 16 , pp. 5516-5519.
Saper, L, L₂-cohomology and intersection homology of certain algebraic varieties with isolated singularities, Inventiones Mathematicae, vol. 82 no. 2 , pp. 207-255, Springer Nature.

Preprints

L. Ji, K. Murty, L. Saper, and J. Scherk, The Congruence Subgroup Kernel and the Fundamental Group of the Reductive Borel-Serre Compactification (June, 2011).

Last modified: 2024/04/17