1. Guest Editors’ Foreword

   • Gil Kalai
   • Bojan Mohar
   • Isabella Novik

   Editorial 12 June 2020 Pages: 229 - 232

   

2. Theorems of Carathéodory, Helly, and Tverberg Without Dimension

   • Karim Adiprasito
   • Imre Bárány
   • Tamás Terpai

   Branko Grünbaum Memorial Issue 19 June 2020 Pages: 233 - 258

   

3. Treetopes and Their Graphs

   • David Eppstein

   Branko Grünbaum Memorial Issue 25 January 2020 Pages: 259 - 289

   

4. On Polyatomic Tomography over Abelian Groups: Some Remarks on Consistency, Tree Packings and Complexity

   • Peter Gritzmann
   • Barbara Langfeld

   Branko Grünbaum Memorial Issue Open access 02 February 2020 Pages: 290 - 303

   

5. Intersection Patterns of Planar Sets

   • Gil Kalai
   • Zuzana Patáková

   Branko Grünbaum Memorial Issue 02 June 2020 Pages: 304 - 323

   

6. Ordered and Convex Geometric Trees with Linear Extremal Function

   • Zoltán Füredi
   • Alexandr Kostochka
   • Jacques Verstraëte

   Branko Grünbaum Memorial Issue 09 November 2019 Pages: 324 - 338

   

7. On Regular Polytopes of 2-Power Order

   • Dong-Dong Hou
   • Yan-Quan Feng
   • Dimitri Leemans

   Branko Grünbaum Memorial Issue 31 July 2019 Pages: 339 - 346

8. Complexity Yardsticks for f-Vectors of Polytopes and Spheres

   • Eran Nevo

   Branko Grünbaum Memorial Issue 10 October 2019 Pages: 347 - 354

9. The Schläfli Fan

   • Michael Joswig
   • Marta Panizzut
   • Bernd Sturmfels

   Branko Grünbaum Memorial Issue Open access 22 June 2020 Pages: 355 - 381

   

10. A One-Page Solution of a Problem of Erdős and Purdy

    • Rom Pinchasi
    • Alexandr Polyanskii

    Branko Grünbaum Memorial Issue 16 October 2019 Pages: 382 - 385

    

11. Embeddability of Arrangements of Pseudocircles and Graphs on Surfaces

    • Éric Colin de Verdière
    • Carolina Medina
    • Gelasio Salazar

    Branko Grünbaum Memorial Issue 23 August 2019 Pages: 386 - 395

    

12. Triangulations and a Discrete Brunn–Minkowski Inequality in the Plane

    • Károly J. Böröczky
    • Máté Matolcsi
    • Oriol Serra

    Branko Grünbaum Memorial Issue 29 August 2019 Pages: 396 - 426

    

13. Unconditional Reflexive Polytopes

    • Florian Kohl
    • McCabe Olsen
    • Raman Sanyal

    Branko Grünbaum Memorial Issue Open access 16 April 2020 Pages: 427 - 452

    

14. The Assembly Problem for Alternating Semiregular Polytopes

    • Barry Monson
    • Egon Schulte

    Branko Grünbaum Memorial Issue 14 August 2019 Pages: 453 - 482

    

15. Pairing Symmetries for Euclidean and Spherical Frameworks

    • Katie Clinch
    • Anthony Nixon
    • Walter Whiteley

    Branko Grünbaum Memorial Issue Open access 15 April 2020 Pages: 483 - 518

    

16. An Exploration of Locally Spherical Regular Hypertopes

    • Maria Elisa Fernandes
    • Dimitri Leemans
    • Asia Ivić Weiss

    Branko Grünbaum Memorial Issue 03 June 2020 Pages: 519 - 534

    

17. Plus Minus Analogues for Affine Tverberg Type Results

    • Pavle V. M. Blagojević
    • Günter M. Ziegler

    Branko Grünbaum Memorial Issue 01 August 2019 Pages: 535 - 541

    

18. Chiral Astral Realizations of Cyclic 3-Configurations

    • Leah Wrenn Berman
    • Philip DeOrsey
    • Arjana Žitnik

    Branko Grünbaum Memorial Issue 27 April 2020 Pages: 542 - 565