A B C D E 1 2 Visitors Supported by MRI 3 2017-2018 4 5 Seminars 6 Name Seminar Talk Title Date of Visit Home Institution Arrangements with group actions and 7 Christin Bibby Algebraic Geometry representation stability 10/30/17-11/1/17 University of Michigan 8 Roi Docampo Algebraic Geometry Differentials on the arc space 10/16/17-10/19/17 University of Oklahoma 9 Christopher Manon Algebraic Geometry Problems with Khovanskii bases 11/6/17-11/7/17 University of Kentucky Arithmetic Representations of Fundamental 10 Daniel Litt Algebraic Geometry Groups 11/13/17-11/14/17 Columbia University Interpolating between the Batyrev-Manin and 11 Matthew Satriano Algebraic Geometry Malle Conjectures 12/2/17-12/9/17 University of Waterloo 12 Nicola Tarasca Algebraic Geometry Hyperelliptic loci in moduli spaces of curves 2/18/18-2/21/18 Rutgers University Homogeneous vector bundles on abelian 13 Michel Brion Algebraic Geometry varieties via representation theory 4/15/18-4/21/18 Institut Fourier 14

Fourier Decay of Singular Measures, Salem Sets, 15 Kyle Hambrook Analysis and Operator Theory and Metric Diophantine Approximation 9/27/17-10/1/17 University of Rochester Spectral instabilities of Schrödinger operators 16 Petr Siegl Analysis and Operator Theory with complex potentials 10/16/17-10/23/17 University of Bern

Comparing the degrees of unconstrained and 17 Dany Leviatan Analysis and Operator Theory constrained approximation by polynomials 5/15/18-5/18/18 Tel Aviv University 18 Gerald Dunne Analysis and Operator Theory 5/8/18-5/11/18 University of Connecticut 19

Biological architecture: the search for geometric 20 Erik Taylor Applied Math patterns in normal and pathological tissues 8/23/17-8/27/17 Boston University

Transit times and mean ages for non- autonomous and autonomous compartmental 21 Ying Wang Applied Math systems modeling the terrestrial carbon cycle 10/25/17-10/28/17 University of Oklahoma Integrating diverse analyses reveals a convergent design principle of B cell 22 Tongli Zhang Applied Math differentiation 12/7/17-12/8/17 University of Cincinnati 23 Thomas Strohmer Applied Math 1/31/18-2/2/18 UC Davis

24 Xingfu Zou Applied Math 4/19/18-4/21/18 University of Western Ontario 25 A B C D E 26 Bhargav Narayanan Combinatorics Diffusion on Graphs 10/18/17-10/20/17 Rutgers University 27 Eric Foxall Combinatorics The compulsive gambler with allowances 11/1/17-11/5/17 University of Alberta On largest eigenvalues of bounded degree 28 Mustazee Rahman Combinatorics graphs 11/15/17-11/18/17 MIT 29 Kyle Luh Combinatorics Embedding Large Graphs in Random Graphs 12/6/17-12/8/17 Harvard 30 Oanh Nguyen Combinatorics Roots of random functions 3/27/18-3/29/18 Princeton University 31 Matthew Junge Combinatorics Chase-Escape 4/25/18-4/27/18 Duke University 32 33 William Heinzer Commutative Algebra Intersections of Regular Local Rings of Dimension 10/8/17-10/10/17 Purdue University California State University - 34 Jesse Elliott Commutative Algebra Closure Operations on Ideals and Submodules 10/21/17-10/24/17 Channel Islands Transference of ring-theoretic properties in D+M 35 Jason Boynton Commutative Algebra (and generalizations) 2/11/18-2/13/18 North Dakota State University Tight closure from the point-of-view of 36 Hans Schoutens Commutative Algebra difference closure 3/16/18-3/19/18 CUNY

37 Bruce Olberding Commutative Algebra Local rings as points in topological spaces 3/16/18-3/20/18 New Mexico State University Factorization in Polynomial Rings with Zero 38 Ranthony Edmonds Commutative Algebra Divisors 4/15/18-4/17/18 University of Iowa

Some new constructions of spectral spaces and 39 Marco Fontana Commutative Algebra the Smyth powerdomain theory 4/19/18-4/25/18 University of Rome III 40

On symmetry of complete locally conformally flat metrics on canonical domains of the round 41 Zheng-Chao Han Differential Geometry sphere with constant Q-curvature 11/8/17-11/9/17 Rutgers University Geometry of harmonic maps into singular 42 Brian Freidin Differential Geometry spaces 10/30/17-11/6/17 Brown University On the geometric meaning of some quantities 43 Zhongmin Shen Differential Geometry of Finsler metrics 11/16/2017 IUPUI Some results on strongly pseudoconvex complex 44 Chunping Zhong Differential Geometry Finsler metrics 11/16/2017 Xiamen University 45 Peng Lu Differential Geometry Solitons and ancient solutions in Ricci flow 3/19/18-3/21/18 University of Oregon 46 Jie Qing Differential Geometry On hypersurfaces in Hyperbolic Space 2/19/18-2/21/18 UC Santa Cruz 47 Divergent trajectories in arithmetic 48 Nattalie Tamam Ergodic Theory homogeneou spaces of rational rank two 10/1/17-12/12/17 Tel Aviv University

49 Adam Kanigowski Ergodic Theory Disjointness properties of some parabolic flows 10/25/17-10/26/17 Penn State University A B C D E

Cohomology of smooth abelian group actions 50 Kurt Vinhage Ergodic Theory and applications of exotic topological groups 11/15/17-11/16/17

Badly approximable points on manifolds and 51 Lei Yang Ergodic Theory unipotent orbits in homogeneous spaces 1/27/18-2/3/18 Sichuan University The automorphism group of a zero entropy 52 Van Cyr Ergodic Theory symbolic system 2/21/18-2/22/18 Bucknell University Lee-Yang zeros for the Cayley Tree and 53 Roland Roeder Ergodic Theory expanding maps of the circle 3/1/2018 IUPUI On the relationship between entropy and 54 Bryce Weaver Ergodic Theory periodic orbits 3/8/2018 Xavier University Periodic point growth for C^2 maps of the two 55 Yun Yung Ergodic Theory sphere 3/22/2018 CUNY A classification of intermediate β- 56 Tony Samuel Ergodic Theory transformations 4/18/18-4/21/18 Cal State Poly San Luis Obispo Unique Equilibrium States for Geodesic Flows on 57 Lien-Yung Kao Ergodic Theory Surfaces without Focal Points 5/30/18-6/1/18 University of Chicago 58 Geometry, Combinatorics, and Pattern avoidance and fiber bundle structures 59 Edward Richmond Integrable Systmes on Schubert varieties 9/27/17-9/29/17 Oklahoma State University Geometry, Combinatorics, and 60 Tair Akhmejanov Integrable Systmes Affine Growth Diagrams 10/4/17-10/6/17 Cornell University Geometry, Combinatorics, and Combinatorics of Lusztig's t-analogue of weight 61 Cristian Lenart Integrable Systmes multiplicity 10/18/17-10/21/17 SUNY at Albany Geometry, Combinatorics, and 62 Daniel Corey Integrable Systmes Initial degenerations of Grassmannians 1/7/18-1/12/18 Yale University Geometry, Combinatorics, and 63 Anna Weigandt Integrable Systmes Prism Tableaux and Alternating Sign Matrices 1/31/18-2/2/18 UIUC Geometry, Combinatorics, and 64 Chris Fraser Integrable Systmes Webs, dimers, and total positivity 2/14/18-2/16/18 IUPUI Geometry, Combinatorics, and 65 Martha Precup Integrable Systmes The cohomology of abelian Hessenberg varieties 3/29/18-3/30/18 Northwestern

Geometry, Combinatorics, and Geometry and maximum likelihood estimation 66 Kaie Kubjas Integrable Systmes of the binary latent class model 4/25/18-4/27/18 Aalto University/MIT 67 Algebra versus regularity for group actions on 68 Thomas Koberda Geometric Group Theory one-manifolds 10/2/17-10/6/17 University of Virginia

69 Marc Pengitore Geometric Group Theory Translation-like actions of nilpotent groups 10/16/17-10/20/17 Purdue University 70 Kevin Schreve Geometric Group Theory Action dimension and L2-cohomology 11/15/17-11/19/17 University of Michigan A B C D E 71 Sahana Balasubramanya Geometric Group Theory Acylindrical group actions on quasi-trees 11/2/2017 Vanderbilt University Geometrical finiteness and Veech subgroups of 72 Matt Durham Geometric Group Theory mapping class groups 11/29/17-12/2/17 Yale

73 David Constantine Geometric Group Theory Marked length rigidity for Fuchsian buildings 1/15/18-1/20/18 Weslyan University 74 Thomas Farrell Geometric Group Theory Bundles with negatively curved fibers 1/23/18-2/7/18 Binghamton University

75 Christoforos Neofytidis Geometric Group Theory Aspherical circle bundles and a problem of Hopf 2/4/18-2/7/18 University Geneva Geometric structures on surfaces with a 76 Lorenzo Ruffoni Geometric Group Theory maximal number of symmetries 2/21/18-2/23/18 Yale University 77 78 Phillip Jedlovec Homotopy Theory The generalized homology of BU 2k 11/1/17-11/3/17 University of Notre Dame

79 Eva Belmont Homotopy Theory Localizing the E 2 page of the Adams spectral 10/25/17-10/27/17 MIT Applications of homological algebra to 80 Bob Bruner Homotopy Theory homotopy 11/8/17-11/9/17 Wayne State The homology of algrebras over the spectral Lie 81 Jens Kjaer Homotopy Theory operad 11/15/17-11/17/17 Notre Dame

Hurewicz Images of Real Johnson-Wilson 82 Guchuan Li Homotopy Theory Theories and a recomputation of ER (2)∗RP ∞ 11/27/17-12/1/17 Northwestern 83 Peter Haine Homotopy Theory Monodromy & Stratified Homotopy Theory 12/6/17-12/8/17 MIT 84 Ozgyr Bayindir Homotopy Theory Topological Equivalences of E ∞ DGAs 1/17/18-1/19/18 UIC 85 Nima Rasekh Homotopy Theory A theory of Elementary Higher Toposes 1/31/18-2/2/18 UIUC 86 Berardo Villarreal Homotopy Theory Classifying Spaces for Commutativity 2/21/18-2/23/18 IUPUI Descent Theory and The Local Joyal Model 87 Nicholas Meadows Homotopy Theory Structure 4/2/18-4/4/18 Western Ontario 88 K-Theory and Motivic Homotopy 89 Elden Elmanto Theory Infinite Loop Spaces in Algebraic Geometry 10/3/17-10/5/17 Northwestern University K-Theory and Motivic Homotopy 90 James Quigley Theory The motivic Mahowald invariant 10/18/17-10/20/17 Notre Dame K-Theory and Motivic Homotopy A triangulated approach to the Bloch-Beilinson National Autonomous 91 Jose Pablo Pelaez Theory filtration 11/16/17-11/18/17 University of Mexico K-Theory and Motivic Homotopy 92 Niranjan Ramachandran Theory Gerbes and algebraic cycles 3/22/18-3/23/18 University of Maryland K-Theory and Motivic Homotopy 93 Ravindra Girivaru Theory Lifting classes in K 0 and Chow groups. 3/28/18-3/31/18 University of Missouri K-Theory and Motivic Homotopy Homogeneous vector bundles on abelian 94 Michel Brion Theory varieties via representation theory 4/15/18-4/20/18 Institut Fourier 95 A B C D E Lie Groups and Representation Shifted quantum affine algebras and shifted 96 Oleksander Tsymbaliuk Theory Yangians 8/22/17-8/24/17 Stony Brook University Lie Groups and Representation 97 Noah Arbesfeld Theory A geometric R-matrix for a general surface 10/17/17-10/21/17 Columbia University Lie Groups and Representation The Finkelberg-Ginzburg Mirabolic Monodromy 98 Robin Walters Theory Conjecture 10/31/17-11/2/17 Northeastern University Lie Groups and Representation Perverse sheaves on moment graphs and Columbia University/MSRI 99 Shotaro Mackisumi Theory Soergel category O 2/20/18-2/22/18 Berkeley

Lie Groups and Representation Irreducible components of exotic Springer fibers 100 Daniele Rosso Theory and the Robinson-Schensted correspondence 3/6/18-3/8/18 Indiana University Northwest

Equivalence of tensor categories between Lie Groups and Representation rep(sl(2,C)) and the fusion category of the 101 Florencia Orosz Hunziker Theory modules for the vertex algebra L (1,0) 4/10/18-4/12/18 Yale University Lie Groups and Representation Hall algebra of coherent sheaves on toric 102 Matt Szeczesny Theory varieties over F_1 4/24/18-4/26/18 Boston University 103 Algebraically closed fields with a multiplicative 104 Chieu Minh Tran Logic cyclic ordering 10/23/17-10/25/17 UIUC

105 Travis Nell Logic Distal and non-distal expansions of the reals 11/6/17-11/8/17 UIUC Hilbert's Tenth Problem for Subrings of the 106 Russell Miller Logic Rationals 2/19/18-2/20/18 CUNY Realizability Semantics for Quantified Modal 107 Sean Walsh Logic Logic 4/9/18-4/11/18 UCLA Limit cycles of planar vector fields, Hilbert's 16th 108 Patrick Speissegger Logic problem and o-minimality 4/16/18-4/21/18 McMaster University University of Illinois Urbana- 109 Erik Walsberg Logic Why I am so obsessed with NIP theories 5/28/18-5/31/18 Champaign 110 and Reducing subspaces and commutant algebra of 111 Caixing Gu Operator Algebras some Toeplitz operators 9/2/17-9/9/17 Cal Poly San Luis Obispo Noncommutative Geometry and University of California Santa 112 James Tener Operator Algebras Construction of Segal CFTs 9/18/17-9/24/17 Barbara

Noncommutative Geometry and Pullbacks and nontriviality of associated Mathematical Institute of the 113 Piotr Hajac Operator Algebras noncommutative vector bundles 9/7/2017 Polish Academy of Sciences Noncommutative Geometry and A canonical Cartan subalgebra for the C*- 114 Jonathan Brown Operator Algebras algebra of an etale groupoid 9/13/2017 University of Dayton Noncommutative Geometry and Towards a model theory for σ -finite von 115 Thomas Sinclair Operator Algebras Neumann algebras 11/8/18-11/9/17 Purdue University A B C D E Noncommutative Geometry and 116 Jesse Peterson Operator Algebras Poisson boundaries of II 1 factors 11/1/17-11/3/17 Vanderbilt University Noncommutative Geometry and Infinite index inclusions of von Neumann University of Rome Tor 117 Luca Giorgetti Operator Algebras algebras and extensions in QFT 11/16/2017 Vergata Noncommutative Geometry and 118 Dietmar Bisch Operator Algebras Subfactors and Quantum Symmetries 3/27/18-3/28/18 Vanderbilt University Noncommutative Geometry and 119 Caterina Consani Operator Algebras Homological algebra in characteristic one 5/9/2018 An introduction to noncommutative (free) Noncommutative Geometry and probability/Type III factors from weighted 120 Michael Hartglass Operator Algebras graphs 6/18/18-6/22/18 Santa Clara University 121 122 Shenhui Liu Number Theory Central L-values of Maass wave forms 10/6/17-10/10/17 123 Claire Burrin Number Theory Dedekind sums for cofinite Fuchsian groups 11/11/17-11/13/17 Rutgers University 124 Robert Hough Number Theory The shape of cubic and quartic fields 11/21/2017 Stony Brook Univerity The Fourier Coefficients of a Minimal Parabolic Eisenstein Series on the Double Cover of GL(3) 125 Edmund Karasiewicz Number Theory over Q 1/26/18-1/31/18 UC Santa Cruz 126 Qing Zhang Number Theory Local converse theorem for unitary groups 3/3/18-3/6/18 Sun Yat-Sen University Reduction of dynatomic curves: The good, the 127 Andrew Obus Number Theory bad, and the irreducible 3/16/18-3/19/18 University of Virginia 128 Conservation Laws, Shocks, and Random Initial 129 Carey Caginalp PDE Conditions 10/18/17-10/20/17 University of Pittsburgh Asymptotic behavior of solutions to Hessian 130 Yu Yuan PDE equations over exterior domains 11/8/17-11/11/17 University of Washington

A local-in-time Harnack inequality and 131 Chris Henderson PDE applications to reaction-diffusion equations 11/11/17-11/14/17 University of Washington A PDE model to investigate the impact of 132 Gael Raoul PDE climate change on a population 11/27/17-12/1/17 Ecole Polytechnic

Integral Representations of a Class of Harmonic Functions and the Asymptotic Behavior of Beijing Technology & Business 133 Yanhui Zhang PDE Fractional Laplacians in the Half Space 11/21/2017 University Weak* Solutions of Hyperbolic Conservation 134 Robin Young PDE Laws 3/26/18-3/29/18 University of Massachusetts 135 Qiliang Wu PDE The effect of impurities on stripes 4/10/2018 Ohio University On concavity of the principal’s profit maximization facing agents who respond 136 Shuangjian Zhang PDE nonliearly to prices 4/16/18-4/20/18 University of Toronto 137 A B C D E

Quantitative Algebra/Quantative Universityof California - Santa 138 James Tener Topology Construction of Segal CFTs 9/18/17-9/24/17 Barbara

Quantitative Algebra/Quantative The structure of tensor categories via 3- 139 Chris Schommer-Pries Topology dimensional topology 10/16/17-10/18/17 Univerity of Notre Dame

Quantitative Algebra/Quantative 140 Marcel Bischoff Topology On Generalized Metaplectic Modular Categories 10/24/2017 Ohio University

Quantitative Algebra/Quantative 141 Hans Wenzl Topology Reconstructing Spinor Categories 3/5/18-3/7/18 UC San Diego

Quantitative Algebra/Quantative An example of gauging the symmetry of 142 Julia Plavnik Topology modular tensor categories 3/16/18-3/21/18 Texas A&M

Non-crossing partitions and the combinatorics University of Calilfornia - San Quantitative Algebra/Quantative of free probability/Fisher information and Diego & University of 143 Ian Charlesworth Topology conjugate variables in bi-free probability theory 6/16/18-6/22/18 California - Berkeley 144

Quantum Information Quantum error-correcrting codes from curves - 145 Gretchen Matthews Science/Quantum Computing new constructions and considerations 2/22/18-2/25/18 Clemson University Quantum Information 146 Ashwin Nayak Science/Quantum Computing Online learning of quantum states 3/29/18-4/1/18 University of Waterloo 147 Cartesian versus monoidal categories: the tensor product of algebraic structures in a Pontifical Catholic University 148 Joaquin Diaz-Boils Ring Theory general setting 9/8/2017 of Ecuador

Leavitt Path Algebras having Bases Consisting 149 Dan Bossaller Ring Theory Solely of Strongly Regular Elements 9/22/2017 Ohio University Centre for Mathematical and 150 M. A. Pathan Ring Theory Generalized special functions via Lie algebras 10/5/17-10/7/17 Statistical Sciences A Family of Examples of Generalized Perfect 151 Pinar Aydogdu Ring Theory Rings 10/20/2017 Hacettepe University A survey of irreducible morphism and its Universidad Nacional 152 Lizbeth Sandoval Ring Theory degrees 10/27/2017 Autonoma de Mexico Poor modules with no proper poor direct 153 Sergio Lopez Ring Theory summands 11/17/2017 Ohio University Amenable bases that are not properly congenial 154 Rebin Muhammad Ring Theory to any others 12/1/2017 Ohio University A B C D E A Topological Characterization of Amenability and Congeniality of Bases of Infinite 155 Benjamin Stanley Ring Theory Dimensional Algebras 1/26/2018 Ohio University Error Correcting Codes in a Frobenius Algebra 156 Erik Hieta-aho Ring Theory Ambient 2/9/2018 Ohio University Infinite Dimensional Algebras with no Simple 157 Pinar Aydogdu Ring Theory Bases 2/23/2018 Hacettepe University

158 Surjeet Singh Ring Theory Rings with cyclic modules almost self-injective 3/15/18-3/18/18 Punjab University 159 Louis Halle Rowen Ring Theory Exterior Semi-Algebras 3/15/18-3/18/18 Bar Ilan University Universidad Nacional 160 Lizbeth Sandoval Ring Theory Topological spaces associated to a module 4/6/2018 Autonoma de Mexico Differences Between Various Classes of Module 161 Jae Keol Park Ring Theory Hulls 4/27/2018 National Busan University 162 Basmajian-type identities and Hausdorff 163 Mary He Topology dimension of limit sets 2/5/18-2/7/18 University of Chicago The Dimension of the Restricted Hitchin University of Tennessee- 164 Elise Weir Topology Component for a Triangle Group 2/5/18-2/7/18 Knoxville A structure theorem for RO (C 2)-graded 165 Clover May Topology cohomology 2/7/18-2/9/18 University of Oregon Relative Topological Complexity for Pairs of 166 Robert Short Topology Right-Angled Artin Groups 3/26/18-3/27/18 Lehigh 167 Rita Gitik Topology A New Algorithm in Group Theory 4/4/18-4/6/18 University of Michigan 168 Shmuel Weinberger Topology Embeddings and group actions 4/11/18-4/12/18 Universit of Chicago 169 170 Michael Cantanzaro Topology-Geometry-Data Stochastic dynamics of cellular cycles 9/25/17-9/27/17 University of Florida

Graph-based Bayesian learning: continuum 171 Nicolas Garcia-Trillos Topology-Geometry-Data limits and scalability of sampling algorithms. 11/6/17-11/8/17 Brown University Applied and computational topology - from theory though algorithms to solutions of real 172 Pawel Dlotko Topology-Geometry-Data problems 1/17/18-1/19/18 Swansea University 173 Radmila Sazdanovic Topology-Geometry-Data Chromatic-type homology theories 3/18/18-3/21/18 NCSU 174 Saugata Basu Topology-Geometry-Data On the Reeb spaces of definable maps. 4/30/18-5/2/18 Purdue University 175 176 Short Term Visitors 177 Inger Knutson Short Term Visitor 7/10/17-7/26/17 University of Agder Central China Normal 178 Quanting Zhao Short Term Visitor 11/18/17-11/26/17 University 179 Gael Raoul Short Term Visitor 11/27/17-12/1/17 Ecole Polytechnic 180 Giang Le Short Term Visitor 12/14/17-12/17/17 Oregon State University A B C D E 181 Kevin Schreve Short Term Visitor 12/14/17-12/16/17 University of Michigan 182 Daniel Corey Short Term Visitor 1/7/18-1/12/18 Yale University 183 Nobuaki Obata Short Term Visitor 1/14/18-1/20/18 Tohoku University Ecole Normale Superieure de 184 Vincent Calvez Short Term Visitor 2/4/18-2/9/18 Lyon Norwegian University of 185 Berit Stensones Short Term Visitor 3/11/18-3/18/18 Science and Technology Beijing University of 186 Shu Wang Short Term Visitor 3/2/18-3/19/18 Technology 187 Tadeusz Januszkiewicz Short Term Visitor 4/10/18-4/25/18 University of Wroclaw 188 Michel Brion Short Term Visitor 4/15/18-4/21/18 Institut Fourier 189 Marco Fontana Short Term Visitor 4/19/18-4/25/18 University of Rome III 190 191 Long Term Visitors University Pierre et Marie 192 Leo Girardin Long Term Visitor 9/4/17-11/26/17 Curie 193 Thomas Farrell Long Term Visitor 1/23/18-2/7/18 Binghamton University 194 Jae Keol Park Long Term Visitor 4/21/18-5/6/18 Busan National University 195 Petr Siegl Long Term Visitor 5/1/18-5/23/18 Queen's University 196 Marcus Slupinski Long Term Visitor 5/16/18-6/13/18 University of Strasbourg 197 198 Distinguished Visitors 199 Carlos Kenig Rado Lecturer 11/13/17-11/15/17 University of Chicago 200 Sergey Fomn Zassenhaus Lecturer 4/16/18-4/18/18 University of Michigan