## Current Members of the Scientific Advisory Board

**Louigi Addario-Berry**(McGill University) - Probability, Combinatorics, Mathematical Statistics, Theoretical Computer Science, Statistical Physics**Martin Barlow**(University of British Columbia) - Probability Theory**Yuri Berest**(Cornell University) - Representation Theory and Geometry**W. John Braun**(University of British Columbia -- Okanagan)**Caroline Colijn**(Simon Fraser University)**Anne Condon**(University of British Columbia) - Computational Complexity Theory and Design of Algorithms**Maria J. Esteban**(CNRS & Universite de Paris-Dauphine)**Nassif Ghoussoub**(University of British Columbia) - Non-linear Analysis, Partial Differential Equations**Antonella Grassi**(Università di Bologna) - Algebraic Geometry and Applications to the Physics of String Theory**Nalini Joshi**(University of Sydney) - Non-linear differential and difference equations**Achim Kempf**(University of Waterloo)**Matthew Kennedy**(University of Waterloo)**Laks Lakshmanan**(University of British Columbia)**Jian-shu Li**(Hong Kong University of Science and Technology) - Representation theory and Automorphic forms**Vlada Limic**(Université de Strasbourg) - Probability and Stochastic Processes**Alexander Litvak**(University of Alberta) - Asymptotic Geometric Analysis, Functional Analysis, Convex Geometry, Discrete Geometry, Random Matrix Theory.**Janos Pach**(NYU Courant and Renyi Institute of Mathematics, Budapest)**Lillian Pierce**(Duke University) - Analytic Number Theory and Harmonic Analysis**David Pike**(Memorial University of Newfoundland) - Combinatorial Design Theory, Graph Theory, and Combinatorial Computing**Cheryl Praeger**(University of Western Australia) - Group Theory, Combinatorics, Discrete Mathematics and Geometry**Malabika Pramanik**(University of British Columbia) - Harmonic Analysis**Jacqui Ramagge**(Durham University)**Yongbin Ruan**(University of Michigan) - Geometry and Topology**Barry Sanders**(University of Calgary) - Quantum Algorithms and Implementations of Quantum Information Tasks**Samir Siksek**(University of Warwick) - Computational Number Theory and Diophantine Equations**Ronnie Sircar**(Princeton University) - Financial Mathematics, stochastic volatility models, energy markets and exhaustible resources, credit risk, asymptotic and computational methods, portfolio optimization and stochastic control problems, and stochastic differential games**Frank Sottile**(Texas A & M University) - Algebraic Combinatorics and the Applications of Algebraic Geometry**Gabriella Tarantello**(Roma Tor Vergata)**Paul Tupper**(Simon Fraser University) - Mathematical Modelling in Linguistics and Psychology**Matthew Valeriote**(McMaster University) - Mathematical Logic, Universal Algebra, Model Theory, Computational Complexity**Juncheng Wei**(University of British Columbia) - Nonlinear Partial Differential Equations, Applied, Nonlinear and Geometric Analysis, Mathematical Biology**Ben Williams**(University of British Columbia) - Algebraic Topology**Allan Willms**(University of Guelph) - Mathematical Biology, Dynamical Systems, Bifurcation Theory, Scientific Computing, and Climate Change Modelling**Shou-Wu Zhang**(Princeton University) - Number Theory & Arithmetic Algebraic Geometry

## Bio sketches

**Louigi Addario-Berry**(McGill University)Louigi Addario-Berry received his Ph.D. from McGill University in 2006 under the supervision of Bruce Reed. He was Marie Curie Fellow at University of Oxford and Professeur Adjoint at Université de Montréal, before joining the faculty at McGill University in 2009. His principle research area is probability theory and its connections with combinatorics, statistics, statistical mechanics and theoretical computer science. In 2016 he was awarded the Coxeter-James Prize of the Canadian Mathematical Society, and in 2019 he was elected Fellow of the Canadian Mathematical Society. In 2020 he was elected Fellow of the Institute of Mathematical Statistics, cited for "fundamental contributions to probability, in particular to the topics of branching structures and random graphs, and for his devoted service to the mathematical sciences and promotion of diversity within them."

**Martin Barlow**(University of British Columbia)Martin Barlow received his doctoral degree from the University of Wales in 1979, and has held appointments at the University of Cambridge and the University of British Columbia. He is now Emeritus Professor of Mathematics at UBC. He is a Fellow of the Royal Society of Canada and of the Royal Society (London), and gave an invited talk at the 1990 International Congress of Mathematicians. He has received the Jeffery-Williams prize of the Canadian Mathematical Society, and the CRM-Fields-PIMS research prize of the Canadian Mathematical Institutes. His research is in probability theory, and in particular the study of diffusion and random walks in various types of irregular media.

**Yuri Berest**(Cornell University)Yuri Berest obtained his B.Sc. (1993) and M.Sc. in Mathematical Physics (1994) from Moscow Institute of Physics and Technology, and his Ph.D. in Mathematics (1997) from the Université de Montréal. After spending two years as a Ch. B. Morrey assistant professor at the University of California in Berkeley, he moved to Cornell University, where he is currently full professor at the Department of Mathematics. He held long-term visiting professorships at IHES (France), Oxford University (All Souls College), MSRI (Berkeley) and ETH (Zurich). He was awarded the CMS Doctoral Prize (1998), Alfred P. Sloan Research Fellowship (2001-2003) and Simons Fellowship in Mathematics (2019). His research interests include representation theory, algebraic geometry, homological algebra, and mathematical physics. Some of his recent work is related to derived algebraic geometry, and applications of homotopy-theoretic methods in representation theory and geometry.

**W. John Braun**(University of British Columbia -- Okanagan)

**Caroline Colijn**(Simon Fraser University)

**Anne Condon**(University of British Columbia)Anne Condon is a professor of Computer Science at the University of British Columbia. She received her Ph.D. from the University of Washington in 1987 and her B.Sc. from University College Cork, Ireland in 1982. She is interested in computational complexity theory and design of algorithms. Over the years, the problems she has worked on come from many areas, including bioinformatics, hardware verification, and combinatorial auctions. Much of her current work focuses on models (such as Chemical Reaction Networks) and algorithms for computing with molecules, as well as methods for predicting DNA kinetics.

**Maria J. Esteban**(CNRS & Universite de Paris-Dauphine)

**Nassif Ghoussoub**(University of British Columbia)Nassif Ghoussoub obtained his Doctorat d'état in 1979 from the Université Pierre et Marie Curie in Paris, France and is currently a Professor of Mathematics and a Distinguished University Scholar at the University of British Columbia. His present research interests are in non-linear analysis and partial differential equations. He was the recipient of the Coxeter-James prize in 1990, and of a Killam senior fellowship in 1992. In 2004, he was awarded a Doctorat Honoris Causa by the Université Paris-Dauphine, and in 2015, he was named Doctor of Science Honoris Causa by the University of Victoria. The Canadian Mathematical Society awarded him the Jeffrey Williams Prize in 2007, and the David Borwein Distinguished Career Award in 2010. He was elected Fellow of the Royal Society of Canada in 1993, and was appointed Officer of the Order of Canada in December 2015.

**Antonella Grassi**(Università di Bologna)Antonella Grassi is Full Professor at the University of Bologna, Italy, and Professor Emerita of Mathematics (with secondary appointment in Physics) at the University of Pennsylvania. She received her Ph. D. from Duke University. She is a Fellow of the American Mathematical Society and a 2018-2019 Simons Fellow in Mathematics. She was a member of the Institute for Advanced Study and the Mathematical Science Research Institute (she also co-organized the 2019 Special Program on Derived Geometry and Moduli Spaces).

Antonella Grassi's research interests are in algebraic geometry and applications to the physics of string theory.

**Nalini Joshi**(University of Sydney)Professor Nalini Joshi AO is Payne-Scott Professor, Chair of Applied Mathematics at the University of Sydney, and a Georgina Sweet Australian Laureate Fellow.

Professor Joshi was born and spent her early childhood in Burma, before her family emigrated to Australia. She was awarded a BSc (Hons) by the University of Sydney and then a PhD by Princeton University in the USA.

In 2012, Professor Joshi was awarded an Australian Research Council Georgina Sweet Laureate Fellowship to work on the five-year project Geometric Construction of Critical Solutions of Nonlinear Systems which has a component to attract and retain female researchers in STEMM. She was a foundation co-Chair of the SAGE (Science in Australia Gender Equity) initiative jointly managed by the Australian Academy of Science and the Australian Academy of Technological Sciences and Engineering, which led to a pilot of the Athena SWAN scheme in Australia.

In 2015, she was chosen as the London Mathematical Society’s 150th anniversary special Hardy fellow and lecturer; and in 2016 was a CBMS-NSF lecturer in the USA. In the 2016 Queen’s Birthday honours, Professor Joshi was appointed an Officer of the Order of Australia for distinguished service to mathematical science and tertiary education as an academic, author and researcher, to professional societies, and as a role model and mentor of young mathematicians.

**Achim Kempf**(University of Waterloo)

**Matthew Kennedy**(University of Waterloo)

**Laks Lakshmanan**(University of British Columbia)

**Jian-shu Li**(Hong Kong University of Science and Technology)Jian-shu Li is the current President of the Hong Kong Mathematical Society. Li was born in Xiaoshan, Zhejiang, China. He studied mathematics at the Department of Mathematics at Zhejiang University, and later obtained his Ph.D. in mathematics from Yale University. Before moving to Hong Kong, Li was a professor at the University of Maryland, College Park and Massachusetts Institute of Technology. Li is a Professor of Mathematics at the Hong Kong University of Science and Technology. He is also a researcher at the Center of Mathematical Sciences, Zhejiang University, as well as a guest professor and doctoral advisor at Zhejiang University's Department of Mathematics.

**Vlada Limic**(Université de Strasbourg)Prof. Vlada Limic is originally from Zagreb, Croatia where she completed undergraduate studies in mathematics. From 1994 to 98 conducted PhD studies at UC Berkeley. Followed NSF postdoctoral fellowship at UC San Diego and at Cornell. From 2002-2007 a junior faculty at UBC. From 2006-2012 worked as independent researcher at CNRS, in Marseilles, France. In 2012 promoted to a research director of 2nd class within CNRS and moved to Orsay, Paris 11. In 2017 moved to University of Strasbourg. Major recognition: A.P. Sloan fellowship 2005, Alexander von Humboldt Bessel Research Award 2016.

**Alexander Litvak**(University of Alberta)Alexander Litvak got his diploma (an analog of MSc degree) from Saint Petersburg State University, Russia, and his PhD from Tel Aviv University, Israel under the supervision of E.D. Gluskin and V.D. Milman. He was a postdoctoral fellow at the University of Alberta and a Lady Davis postdoctoral fellow at the Technion, Haifa, Israel. He joined the University of Alberta as a faculty member in 2001. In 2010 Alexander was awarded the Faculty of Science Research Award by the University of Alberta and the next year he was awarded the E.W.R Steacie Memorial Fellowship by NSERC.

Alexander works in Asymptotic Geometric Analysis, which lies at the border between geometry and analysis stemming from the study of geometric properties of high-dimensional normed spaces, especially the characteristic behavior that emerges when the dimension (or a number of other relevant free parameters) is suitably large or tends to infinity. Because high-dimensional phenomena impact many disciplines, the Asymptotic Geometric Analysis is seen as the cross-roads of many branches of mathematics including Functional Analysis, Convex and Discrete Geometry, Random Matrix Theory, and several areas of Probability and Statistics.

**Janos Pach**(NYU Courant and Renyi Institute of Mathematics, Budapest)

**Lillian Pierce**(Duke University)Lillian Pierce is the Nicholas J. and Theresa M. Leonardy Professor of Mathematics at Duke University. She received her PhD from Princeton in 2009, with advisor Elias M. Stein. Subsequently she was a Member and NSF postdoc at the IAS, a Marie Curie Fellow at the University of Oxford, and a Bonn Junior Fellow at the Hausdorff Center for Mathematics in Bonn. As a young faculty member, Pierce was awarded an NSF CAREER award, a Sloan Research Fellowship, the Joan and Joseph Birman Fellowship, the AWM-Sadosky Research Prize, and the Presidential Early Career Award in Science and Engineering (PECASE). She has been a von Neumann Fellow at the IAS and a Bonn Research Fellow. Pierce holds editorial positions including at the Journal of the AMS, Transactions of the AMS, Memoirs of the AMS, Journal of Geometric Analysis, and Annals of Math. Studies. Pierce is committed to enhancing the mathematics we do, and the way we do it, by deepening the inclusiveness of the mathematics community.

**David Pike**(Memorial University of Newfoundland)David Pike received a BMath degree in 1992 from the University of Waterloo and a PhD in 1996 from Auburn University. In 1998 he joined the faculty at Memorial University of Newfoundland where he is currently a University Research Professor in the Department of Mathematics and Statistics (with a cross-appointment to the Department of Computer Science). His research involves combinatorial design theory and graph theory. Recent work has been on such topics as colourings of combinatorial designs and graph decompositions, configuration orderings, as well as graph-based games.

He was awarded the Hall Medal of the Institute of Combinatorics and its Applications in 2007. He has served on NSERC panels for grants and scholarships and was Vice-President (Atlantic) of the Canadian Mathematical Society (2015-2017). Currently he is on editorial boards for the Australasian Journal of Combinatorics and the Journal of Combinatorial Designs. Since 2016 he has been a Vice-President of the Institute of Combinatorics and its Applications.

**Cheryl Praeger**(University of Western Australia)Cheryl Praeger is Emeritus Professor of Mathematics at the University of Western Australia. She was formerly an Australian Research Council Federation Fellow (2007-2012) and was the inaugural Director of the Centre for the Mathematics of Symmetry and Computation at UWA (2010-2013). Her research work has transformed our understanding of how groups act on large complex systems, through new theories, constructions, algorithms and designs, which exploit the classification of the finite simple groups.

Prior to her appointment at the University of Western Australia she was a Research Fellow at the Australian National University and taught for a semester at the University of Virginia. She has taught in the Mathematics and Statistics program at UWA and was Head of the Department of Mathematics 1992-94, inaugural Dean of Postgraduate Research Studies 1996-98, Chair of the Promotions and Tenure Committee 2000-04, Deputy Dean of the Faculty of Engineering, Computing and Mathematics 2003-06, and an Australian Research Council Professorial Fellow 2007.

Professor Praeger received BSc and MSc degrees from the University of Queensland, a DPhil degree from the University of Oxford in 1973, and has received honorary doctorates from Universities in Thailand, Belgium, Iran and Scotland. She has served on the Executive of the International Mathematical Union and is Vice President of the International Commission for Mathematical Instruction. She is Fellow of the American Mathematical Society, an Honorary member of the London Mathematical Society, and she was the first woman to be President of the Australian Mathematical Society of which she is now an Honorary Life Member.

Professor Praeger has published more than 360 journal articles and four research monographs, many of them with her students (30 PhD students, 10 research masters students, 21 postdoctoral research associates) and research colleagues. She has played an active role supporting and mentoring young scientists, especially women. The Women in Mathematics Special Interest Group of the Australian Mathematical Society named their travel awards for her. She has received a University of Western Australia award for excellence in teaching, and an Australian government Citation for Outstanding Contributions to Student Learning. Professor Praeger was appointed a member of the Order of Australia in 1999, and awarded a Centenary Medal for her contributions to Mathematics in Australia, especially through research and service to professional societies. She is a recipient of a number of awards including the Thomas Ranken Lyle Medal of the Australian Academy of Science and the George Szekeres Medal of the Australian Mathematical Society. She was named 2009 Western Australian Scientist of the Year, and was the 2015 inductee into the Western Australian Science Hall of Fame. She was elected to the Australian Academy of Science in 1996, and serves as its Foreign Secretary 2014-2018. She represents the Australian Academy of Science on the Executive Board of the Inter-Academy Partnership IAP-Science.

**Malabika Pramanik**(University of British Columbia)Malabika Pramanik is a Canadian mathematician who works as a professor of mathematics at the University of British Columbia. Her research lies in mathematical analysis, specifically in the areas of harmonic analysis, geometric measure theory, complex variables, and partial differential equations. Her work focuses on exploring finer structures in mathematical ensembles involving sets and functions, in particular on fractals. One recurrent theme in her work is the search for patterns in seemingly random objects and their connections with quantifiable properties of these objects, such as regularity, clustering, smoothness or existence of arithmetic-geometric structures. Malabika received her Ph.D. in mathematics from the University of California, Berkeley (2001). After short-term positions at the University of Wisconsin and Caltech she joined UBC in 2006. She is the 2015-16 winner of the Ruth I. Michler Prize of the Association for Women in Mathematics, the 2016 Krieger-Nelson Prize of the Canadian Mathematical Society (CMS) and a Killam Research Prize (2017) from the UBC Faculty of Science. In her role as Vice-President for the Pacific region of the CMS and as organizer of ongoing programs such as "Two weeks in Vancouver - a summer school for undergraduate women in math" and "Diversity in mathematics", she is actively engaged in initiatives that promote representation of women and minority groups in STEM fields.

**Jacqui Ramagge**(Durham University)

**Yongbin Ruan**(University of Michigan)Yongbin Ruan is a Chinese mathematician who deals with algebraic geometry, differential geometry and symplectic geometry with applications in string theory. Ruan studied from 1978 at Sichuan University with a degree in 1985. 1985/86 he was teaching assistant at the University of Wisconsin. He received his doctorate in 1991 from Robinson Kirby (and Tomasz Mrowka) at the University of California, Berkeley ( Gauge theory and its applications to Riemannian Geometry ). As a post-doctoral student, he was at Michigan State University. In 1993 he became Assistant Professor at the University of Utah, 1995 Associate Professor and 1999 Professor at the University of Wisconsin-Madison. Since 2006 he is a professor at the University of Michigan.

He has been a visiting professor at ETH Zurich, Hong Kong and MIT. In 1993 and 2004 he was at the IHES , 1993 at the Max Planck Institute for Mathematics, 1994 at the Isaac Newton Institute and 1994 at the MSRI. In 1998 he was Invited Speaker at the International Congress of Mathematicians in Berlin ( Quantum Cohomology and its Applications ). From 1995 to 1997 he was a Sloan Research Fellow. He is a Fellow of the American Mathematical Society.

**Barry Sanders**(University of Calgary)Dr. Barry Sanders is a Professor and Director of the Institute for Quantum Science and Technology at the University of Calgary, a Thousand Talents Chair at the University of Science and Technology China and a Vajra Visiting Faculty member of the Raman Research Institute in India. He received his Bachelor of Science degree from the University of Calgary and his PhD at Imperial College London. His postdoctoral research was at the Australian National University, the University of Queensland and the University of Waikato. Dr. Sanders was on the Macquarie University faculty from 1991 until moving to Calgary in 2003.

Dr. Sanders is especially well known for seminal contributions to theories of quantum-limited measurement, highly nonclassical light, practical quantum cryptography and optical implementations of quantum information tasks. His current research interests include quantum algorithms and implementations of quantum information tasks. Dr. Sanders is a Fellow of the Institute of Physics (U.K.), the Optical Society of America, the Australian Institute of Physics, the American Physical Society and the Royal Society of Canada. In 2016 Sanders was awarded the Imperial College London Doctor of Science (DSc) degree, and he is Editor-in-Chief of New Journal of Physics.

**Samir Siksek**(University of Warwick)Samir Siksek obtained his B.A. from Oxford, and his PhD from Exeter. He is a Professor of Mathematics at the University of Warwick, and a past holder of an EPSRC Leadership Fellowship. His research focuses on rational points on curves, and the resolution of explicit Diophantine problems.

**Ronnie Sircar**(Princeton University)RONNIE SIRCAR is a Professor of Operations Research and Financial Engineering (ORFE) at Princeton University, and is affiliated with the Bendheim Center for Finance, the Program in Applied and Computational Mathematics, and the Andlinger Center for Energy and the Environment. He received his doctorate from Stanford University, and taught for three years at the University of Michigan in the Department of Mathematics. He has received continuing National Science Foundation research grants since 1998. He was a recipient of the E-Council Excellence in Teaching Award for his teaching in 2002, 2005 and 2006, and the Howard B. Wentz Jr. Junior Faculty Award in 2003. His research interests center on Financial Mathematics, stochastic volatility models, energy markets and exhaustible resources, credit risk, asymptotic and computational methods, portfolio optimization and stochastic control problems, and stochastic differential games. He is a co-author of the book “Multiscale Stochastic Volatility for Equity, Interest-Rate and Credit Derivatives”, published by Cambridge University Press in 2011, and was founding co-editor-in-chief of the SIAM Journal on Financial Mathematics, from 2009-2015. He was Director of Graduate Studies for the Master in Finance program at the Bendheim Center for Finance from 2015-2018. He is the current Chair of the ORFE department. He was made a Fellow of the Society for Industrial and Applied Mathematics (SIAM) in 2020 for “contributions to financial mathematics and asymptotic methods for stochastic control and differential games.”

**Frank Sottile**(Texas A & M University)Dr. Sottile is a Professor of Mathematics at Texas A&M University since 2004. He holds a Masters degree from Cambridge University (1986) and a Ph.D. from the University of Chicago (1994). He has had appointments at the Universities of Toronto, Wisconsin, and Massachusetts, and the MSRI. He was the founding chair of the SIAM Activity group on Algebraic geometry and is a corresponding editor of the SIAM Journal on Applied Algebra and Geometry. He was a Churchill Scholar, held an NSF Career award, and is a Fellow of the American Mathematical Society. His research interests are in algebraic combinatorics and the applications of algebraic geometry, including computational and real algebraic geometry.

**Gabriella Tarantello**(Roma Tor Vergata)

**Paul Tupper**(Simon Fraser University)Paul Tupper is Professor of Mathematics and Director of Cognitive Science at Simon Fraser University. He received his PhD in Scientific Computing-Computational Mathematics from Stanford in 2002, was an NSERC postdoctoral fellow at the Centre for Physics of Materials at McGill University from 2002 to 2004, and was then an Assistant Professor of Mathematics at McGill for the next few years. He has been at SFU since 2008, and he was a Tier 2 Canada Research Chair in Applied Mathematics from 2008 to 2019. His research focuses on problems in metric geometry motivated by phylogenetics as well as mathematical modelling in linguistics and cognitive psychology.

**Matthew Valeriote**(McMaster University)Matt Valeriote is a professor in the Department of Mathematics & Statistics at McMaster University. He obtained a B.Math from the University of Waterloo in 1981 and a Ph.D. from the University of California, Berkeley in 1986. He conducts research in mathematical logic, primarily focussed on the study of general algebraic structures and their applications to theoretical computer science.

**Juncheng Wei**(University of British Columbia)Juncheng Wei received his doctoral degree from the University of Minnesota in 1994, and has held appointments at the Chinese University of Hong Kong (until 2013) and the University of British Columbia. He is now Canada Research Chair Professor (Tier I) at UBC. He is a Fellow of the Royal Society of Canada and gave an invited talk at the 2014 International Congress of Mathematicians. He was awarded the Croucher Senior Fellowship of Croucher Foundation (2005), the Morningside Medal in Mathematics of the Chinese Congress of Mathematicians (2010), the Jeffery-Williams prize of the Canadian Mathematical Society (2020), and Simons Fellowship in Mathematics (2020). His research is in nonlinear partial differential equations and its applications in differential geometry, physical fluids, mathematical biology and applied physics.

**Ben Williams**(University of British Columbia)Ben Williams is an Assistant Professor at UBC in Mathematics. He received his Ph.D. in Mathematics from Stanford University in 2010 and his M.Sc. in Mathematics from University College Dublin in 2004. His research interests encompass the application of homotopy-theoretic methods to problems in, or inspired by, algebra and algebraic geometry.

**Allan Willms**(University of Guelph)Allan Willms is a professor of Mathematics at the University of Guelph. He received his Ph.D. from Cornell University, Center for Applied Mathematics, in 1997 under the supervision of John Guckenheimer. He received an M.Math (1993) and B.Math (1992) from the University of Waterloo. Allan was a faculty member at the University of Canterbury in Christchurch, New Zealand for five years, and has been at Guelph since 2003. Allan's research covers a broad range of areas including mathematical biology, dynamical systems, bifurcation theory, scientific computing, and climate change modelling. He enjoys working with experimentalists, helping solve the problems in which they are interested.

**Shou-Wu Zhang**(Princeton University)Shou-Wu Zhang is a Chinese-American mathematician known for his work in number theory and arithmetic algebraic geometry. He is currently a Professor of Mathematics at Princeton University. He was admitted to the Sun Yat-sen University chemistry department in 1980; he later transferred to the mathematics department of the same institution. He received his bachelor's degree in 1983. After Zhang received his master's degree from the Chinese Academy of Sciences in 1986, he studied under Lucien Szpiro and Gerd Faltings at Columbia University and Princeton University, completing his PhD in 1991. He was a member of the Institute for Advanced Study and an assistant professor at Princeton University from 1991 to 1996. Zhang has been tenured at Columbia University since 1996 and at Princeton University since 2011.