Last update:
Thu Aug 13 09:42:11 MDT 2020
Kenneth L. Clarkson and Günter Rote Welcome from the Editors-in-Chief . . . 1--2 David Eppstein Happy endings for flip graphs . . . . . 3--28 Attila Pór and David R. Wood On visibility and blockers . . . . . . . 29--40 Prosenjit Bose and Paz Carmi and Sébastien Collette and Michiel Smid On the stretch factor of convex Delaunay graphs . . . . . . . . . . . . . . . . . 41--56 Mark de Berg and Herman Haverkort and Constantinos P. Tsirogiannis Visibility maps of realistic terrains have linear smoothed complexity . . . . 57--71 Gunnar Carlsson and Gurjeet Singh and Afra J. Zomorodian Computing multidimensional persistence 72--100 Christian Wulff-Nilsen Computing the maximum detour of a plane geometric graph in subquadratic time . . 101--122
Maarten Löffler and Elena Mumford Connected rectilinear graphs on point sets . . . . . . . . . . . . . . . . . . 1--15 Adrian Dumitrescu Approximate Euclidean Ramsey theorems 16--29 Olivier Devillers Delaunay triangulation of imprecise points: preprocess and actually get a fast query time . . . . . . . . . . . . 30--45 Tetsuo Asano and Wolfgang Mulzer and Günter Rote and Yajun Wang Constant-work-space algorithms for geometric problems . . . . . . . . . . . 46--68 Sriram V. Pemmaraju and Imran A. Pirwani Good quality virtual realization of unit disk graphs . . . . . . . . . . . . . . 69--91 Herman Haverkort Recursive tilings and space-filling curves with little fragmentation . . . . 92--127 Roel Apfelbaum and Itay Ben-Dan and Stefan Felsner and Tillmann Miltzow and Rom Pinchasi and Torsten Ueckerdt and Ran Ziv Points with large quadrant depth . . . . 128--143 David Eppstein Optimally fast incremental Manhattan plane embedding and planar tight span construction . . . . . . . . . . . . . . 144--182 Martin Tancer $d$-representability of simplicial complexes of fixed dimension . . . . . . 183--188 Christian Knauer and Andreas Spillner A fixed-parameter algorithm for the minimum Manhattan network problem . . . 189--204
Jie Gao and Dengpan Zhou The emergence of sparse spanners and well-separated pair decomposition under anarchy . . . . . . . . . . . . . . . . 1--19 Boris Bukh and Gabriel Nivasch Upper bounds for centerlines . . . . . . 20--30 Martin Fürer and Shiva Prasad Kasiviswanathan Spanners for geometric intersection graphs with applications . . . . . . . . 31--64 Sariel Har-Peled and Mira Lee Weighted geometric set cover problems revisited . . . . . . . . . . . . . . . 65--85 Ruy Fabila-Monroy and David R. Wood Colouring the triangles determined by a point set . . . . . . . . . . . . . . . 86--101 Nieves Atienza and Natalia de Castro and Carmen Cortés and M. Ángeles Garrido and Clara I. Grima and Gregorio Hernández and Alberto Márquez and Auxiliadora Moreno-González and Martin Nöllenburg and José Ramón Portillo and Pedro Reyes and Jesús Valenzuela and Maria Trinidad Villar and Alexander Wolff Cover contact graphs . . . . . . . . . . 102--131 Siu-Wing Cheng and Christian Knauer and Stefan Langerman and Michiel Smid Approximating the average stretch factor of geometric graphs . . . . . . . . . . 132--153 Bette Bultena and Matthew Klimesh and Frank Ruskey Minimum area polyomino Venn diagrams . . 154--167 Bernd Gärtner and Martin Jaggi and Clément Maria An exponential lower bound on the complexity of regularization paths . . . 168--195 Paz Carmi and Michiel Smid An optimal algorithm for computing angle-constrained spanners . . . . . . . 196--221 Mark de Berg and Marcel Roeloffzen and Bettina Speckmann Kinetic convex hulls, Delaunay triangulations and connectivity structures in the black-box model . . . 222--249
Gabriel Nivasch and János Pach and Rom Pinchasi and Shira Zerbib The number of distinct distances from a vertex of a convex polygon . . . . . . . 1--12 Michael Kerber Embedding the dual complex of hyper-rectangular partitions . . . . . . 13--37 Anne Driemel and Herman Haverkort and Maarten Löffler and Rodrigo I. Silveira Flow computations on imprecise terrains 38--78 Adrian Dumitrescu Metric inequalities for polygons . . . . 79--93 Bodo Manthey and Heiko Röglin Worst-case and smoothed analysis of $k$-means clustering with Bregman divergences . . . . . . . . . . . . . . 94--132 Sharif Ibrahim and Bala Krishnamoorthy and Kevin R. Vixie Simplicial flat norm with scale . . . . 133--159 Steven J. Gortler and Craig Gotsman and Ligang Liu and Dylan P. Thurston On affine rigidity . . . . . . . . . . . 160--181 Prosenjit Bose and Kai Dannies and Jean-Lou De Carufel and Christoph Doell and Carsten Grimm and Anil Maheshwari and Stefan Schirra and Michiel Smid Network farthest-point diagrams and their application to feed-link network extension . . . . . . . . . . . . . . . 182--211 Mark de Berg and Krzysztof Onak and Anastasios Sidiropoulos Fat polygonal partitions with applications to visualization and embeddings . . . . . . . . . . . . . . . 212--239 Jean Cardinal and Kolja Knauer and Piotr Micek and Torsten Ueckerdt Making triangles colorful . . . . . . . 240--246
Maarten Löffler and Wolfgang Mulzer Unions of onions: preprocessing imprecise points for fast onion decomposition . . . . . . . . . . . . . 1--13 Reza Dorrigiv and Stephane Durocher and Arash Farzan and Robert Fraser and Alejandro López-Ortiz and J. Ian Munro and Alejandro Salinger and Matthew Skala The Hausdorff core problem on simple polygons . . . . . . . . . . . . . . . . 14--40 Michael S. Payne and Jens M. Schmidt and David R. Wood Which point sets admit a $k$-angulation? 41--55 Mikhail Bogdanov and Olivier Devillers and Monique Teillaud Hyperbolic Delaunay complexes and Voronoi diagrams made practical . . . . 56--85 Adrian Dumitrescu and Sariel Har-Peled and Csaba D. Tóth Minimum convex partitions and maximum empty polytopes . . . . . . . . . . . . 86--103 Zsolt Gáspár and Tibor Tarnai and Krisztián Hincz Partial covering of a circle by equal circles. Part I: the mechanical models 104--125 Zsolt Gáspár and Tibor Tarnai and Krisztián Hincz Partial covering of a circle by equal circles. Part II: the case of 5 circles 126--149 Oswin Aichholzer and Greg Aloupis and Erik D. Demaine and Martin L. Demaine and Sándor P. Fekete and Michael Hoffmann and Anna Lubiw and Jack Snoeyink and Andrew Winslow Covering folded shapes . . . . . . . . . 150--167 Matt Gibson and Gaurav Kanade and Erik Krohn and Kasturi Varadarajan Guarding terrains via local search . . . 168--178 David Eppstein and Elena Mumford Steinitz theorems for simple orthogonal polyhedra . . . . . . . . . . . . . . . 179--244 Vytautas Gruslys A counterexample to a geometric Hales--Jewett type conjecture . . . . . 245--249 Stefan König Computational aspects of the Hausdorff distance in unbounded dimension . . . . 250--274 Mark Kozdoba On projections of metric spaces . . . . 275--283 Abdul Basit and Adam Sheffer Incidences with $k$-non-degenerate sets and their applications . . . . . . . . . 284--302
Michael A. Bekos and Chrysanthi N. Raftopoulou On a conjecture of Lovász on circle-representations of simple 4-regular planar graphs . . . . . . . . 1--20 Menelaos I. Karavelas and Christos Konaxis and Eleni Tzanaki The maximum number of faces of the Minkowski sum of three convex polytopes 21--74 Kevin Buchin and Maike Buchin and Marc van Kreveld and Bettina Speckmann and Frank Staals Trajectory grouping structure . . . . . 75--98 Pedro Mart\'\in and Horst Martini Algorithms for ball hulls and ball intersections in normed planes . . . . . 99--107 William Evans and Noushin Saeedi On characterizing terrain visibility graphs . . . . . . . . . . . . . . . . . 108--141 Luc Devroye and James King Random hyperplane search trees in high dimensions . . . . . . . . . . . . . . . 142--164 Magnus Lie Hetland Ptolemaic indexing . . . . . . . . . . . 165--184 Andrei Asinowski and Tillmann Miltzow and Günter Rote Quasi-parallel segments and characterizations of unique bichromatic matchings . . . . . . . . . . . . . . . 185--219 Santanu Bhowmick and Kasturi Varadarajan and Shi-Ke Xue A constant-factor approximation for multi-covering with disks . . . . . . . 220--234 Ronald Ortner Forcing subarrangements in complete arrangements of pseudocircles . . . . . 235--248 Christian Scheffer and Jan Vahrenhold Subquadratic medial-axis approximation in $ \mathbb {R}^3 $ . . . . . . . . . . 249--287 John C. Baez and Karine Bagdasaryan and Philip Gibbs The Lebesgue universal covering problem 288--299 Balázs Keszegh and Dömötör Pálvölgyi More on decomposing coverings by octants 300--315 Danny Z. Chen and Haitao Wang A new algorithm for computing visibility graphs of polygonal obstacles in the plane . . . . . . . . . . . . . . . . . 316--345
Siu-Wing Cheng and Olivier Devillers Guest Editors' Foreword . . . . . . . . 1--1 Tal Kaminker and Micha Sharir Finding the largest disk containing a query point in logarithmic time with linear storage . . . . . . . . . . . . . 3--18 Luis Barba and Prosenjit Bose and Mirela Damian and Rolf Fagerberg and Wah Loon Keng and Joseph O'Rourke and André van Renssen and Perouz Taslakian and Sander Verdonschot and Ge Xia New and improved spanning ratios for Yao graphs . . . . . . . . . . . . . . . . . 19--53 Anna Gundert and May Szedlák Higher dimensional discrete Cheeger inequalities . . . . . . . . . . . . . . 54--71 Sander P. A. A. Alewijnse and Timur M. Bagautdinov and Mark de Berg and Quirijn W. Bouts and Alex P. ten Brink and Kevin Buchin and Michel A. Westenberg Progressive geometric algorithms . . . . 72--92 Bernd Gärtner Sampling with removal in LP-type problems . . . . . . . . . . . . . . . . 93--112 Shay Solomon Euclidean Steiner shallow--light trees 113--139 Frédéric Chazal and Brittany Terese Fasy and Fabrizio Lecci and Alessandro Rinaldo and Larry Wasserman Stochastic convergence of persistence landscapes and silhouettes . . . . . . . 140--161 Ulrich Bauer and Michael Lesnick Induced matchings and the algebraic stability of persistence barcodes . . . 162--191
Maria Axenovich and Torsten Ueckerdt Density of range capturing hypergraphs 1--21 David Eppstein and Danny Holten and Maarten Löffler and Martin Nöllenburg and Bettina Speckmann and Kevin Verbeek Strict confluent drawing . . . . . . . . 22--46 Martin Nöllenburg and Roman Prutkin and Ignaz Rutter On self-approaching and increasing-chord drawings of $3$-connected planar graphs 47--69 Benjamin A. Burton and Murray Elder and Arkadius Kalka and Stephan Tillmann $2$-manifold recognition is in logspace 70--85 Marc Glisse and Sylvain Lazard and Julien Michel and Marc Pouget Silhouette of a random polytope . . . . 86--99 Kevin Buchin and David Eppstein and Maarten Löffler and Martin Nöllenburg and Rodrigo I. Silveira Adjacency-preserving spatial treemaps 100--122 Sergio Cabello and Éric Colin de Verdi\`ere and Francis Lazarus Finding shortest non-trivial cycles in directed graphs on surfaces . . . . . . 123--148 Romanos-Diogenes Diogenes Malikiosis and Sinai Robins and Yichi Zhang Polyhedral Gauss sums, and polytopes with symmetry . . . . . . . . . . . . . 149--170 Zachary Abel and Jason Cantarella and Erik D. Demaine and David Eppstein and Thomas C. Hull and Jason S. Ku and Robert J. Lang and Tomohiro Tachi Rigid origami vertices: conditions and forcing sets . . . . . . . . . . . . . . 171--184 Rafel Jaume and Günter Rote Recursively regular subdivisions and applications . . . . . . . . . . . . . . 185--220 Nikhil Bansal and Kirk Pruhs Weighted geometric set multi-cover via quasi-uniform sampling . . . . . . . . . 221--236 Stephan Tillmann and Sampson Wong An algorithm for the Euclidean cell decomposition of a cusped strictly convex projective surface . . . . . . . 237--255 Stephan Friedrichs and Michael Hemmer and James King and Christiane Schmidt The continuous 1.5D terrain guarding problem: discretization, optimal solutions, and PTAS . . . . . . . . . . 256--284 Sharif Ibrahim and Bala Krishnamoorthy and Kevin R. Vixie Flat norm decomposition of integral currents . . . . . . . . . . . . . . . . 285--307 Andreas Gemsa and Martin Nöllenburg and Ignaz Rutter Consistent labeling of rotating maps . . 308--331 Olivier Devillers and Ross Hemsley The worst visibility walk in a random Delaunay triangulation is $ O(\sqrt n) $ 332--359 Christian Scheffer Near-linear time medial-axis approximation of smooth curves in $ \mathbb {R}^3 $ . . . . . . . . . . . . 360--429 Dominique Attali and Olivier Devillers and Marc Glisse and Sylvain Lazard Recognizing shrinkable complexes is NP-complete . . . . . . . . . . . . . . 430--443 Prosenjit Bose and Paz Carmi and Mirela Damian and Jean-Lou De Caroufel and Darryl Hill and Anil Maheshwari and Yuyang Liu and Michiel Smid On the stretch factor of convex polyhedra whose vertices are (almost) on a sphere . . . . . . . . . . . . . . . . 444--472 Danny Z. Chen and Rajasekhar Inkulu and Haitao Wang Two-point $ L_1 $ shortest path queries in the plane . . . . . . . . . . . . . . 473--519 Mahdi Amani and Ahmad Biniaz and Prosenjit Bose and Jean-Lou De Carufel and Anil Maheshwari and Michiel Smid A plane $ 1.88$-spanner for points in convex position . . . . . . . . . . . . 520--539 Matt Gibson and Gaurav Kanade and Rainer Penninger and Kasturi Varadarajan and Ivo Vigan On isolating points using unit disks . . 540--557
Ho-Lin Chen and David Doty and Ján Ma\vnuch and Arash Rafiey and Ladislav Stacho Pattern overlap implies runaway growth in hierarchical tile systems . . . . . . 3--18 Sariel Har-Peled Shortest path in a polygon using sublinear space . . . . . . . . . . . . 19--45 Karl Bringmann and Wolfgang Mulzer Approximability of the discrete Fréchet distance . . . . . . . . . . . . . . . . 46--76 Esther M. Arkin and Alon Efrat and Christian Knauer and Joseph S. B. Mitchell and Valentin Polishchuk and Günter Rote and Lena Schlipf and Topi Talvitie Shortest path to a segment and quickest visibility queries . . . . . . . . . . . 77--100 Olivier Devillers and Marc Glisse and Xavier Goaoc and Rémy Thomasse Smoothed complexity of convex hulls by witnesses and collectors . . . . . . . . 101--144 Arie Bos and Herman Haverkort Hyperorthogonal well-folded Hilbert curves . . . . . . . . . . . . . . . . . 145--190 Therese Biedl and Martin Derka $1$-string $ B_2 $-VPG representation of planar graphs . . . . . . . . . . . . . 191--215
Helmut Alt and Mark de Berg and Christian Knauer Approximating minimum-area rectangular and convex containers for packing convex polygons . . . . . . . . . . . . . . . . 1--10 Ahmad Biniaz and Prosenjit Bose and Jean-Lou De Carufel and Cyril Gavoille and Anil Maheshwari and Michiel Smid Towards plane spanners of degree 3 . . . 11--31 Jean-Lou De Carufel and Matthew J. Katz and Matias Korman and André van Renssen and Marcel Roeloffzen and Shakhar Smorodinsky On interference among moving sensors and related problems . . . . . . . . . . . . 32--46 Manuel Wettstein Counting and enumerating crossing-free geometric graphs . . . . . . . . . . . . 47--77 Stephane Durocher and Alexandre Leblanc and Matthew Skala The projection median as a weighted average . . . . . . . . . . . . . . . . 78--104 Boris Aronov and Matias Korman and Simon Pratt and André van Renssen and Marcel Roeloffzen Time-space trade-off algorithms for triangulating a simple polygon . . . . . 105--124 Prosenjit Bose and Rolf Fagerberg and André van Renssen and Sander Verdonschot Competitive local routing with constraints . . . . . . . . . . . . . . 125--152 Arnaud Bannier and Nicolas Bodin A new drawing for simple Venn diagrams based on algebraic construction . . . . 153--173 Boris Bukh and Po-Shen Loh and Gabriel Nivasch Classifying unavoidable Tverberg partitions . . . . . . . . . . . . . . . 174--205 Herman Haverkort How many three-dimensional Hilbert curves are there? . . . . . . . . . . . 206--281 Olivier Devillers and Menelaos I. Karavelas and Monique Teillaud Qualitative symbolic perturbation: two applications of a new geometry-based perturbation framework . . . . . . . . . 282--315 David Eppstein Maximizing the sum of radii of disjoint balls or disks . . . . . . . . . . . . . 316--339 Sándor P. Fekete and Andreas Haas and Michael Hemmer and Michael Hoffmann and Irina Kostitsyna and Dominik Krupke and Florian Maurer and Joseph S. B. Mitchell and Arne Schmidt and Christiane Schmidt and Julian Troegel Computing nonsimple polygons of minimum perimeter . . . . . . . . . . . . . . . 340--365 Marc van Kreveld and Maarten Löffler and Frank Staals Central trajectories . . . . . . . . . . 366--386
Sándor P. Fekete and Anna Lubiw Guest Editors' foreword [special issue of selected papers from SoCG2016] . . . 1--1 Iyad Kanj and Ljubomir Perkovi\'c and Duru Türko\uglu Degree four plane spanners: Simpler and better . . . . . . . . . . . . . . . . . 3--31 Martin Fink and John Hershberger and Nirman Kumar and Subhash Suri Hyperplane separability and convexity of probabilistic point sets . . . . . . . . 32--57 Glencora Borradaile and Erin Wolf Chambers and Kyle Fox and Amir Nayyeri Minimum cycle and homology bases of surface-embedded graphs . . . . . . . . 58--79 Irina Kostitsyna and Maarten Löffler and Valentin Polishchuk and Frank Staals On the complexity of minimum-link path problems . . . . . . . . . . . . . . . . 80--108 Markus Geyer and Michael Hoffmann and Michael Kaufmann and Vincent Kusters and Csaba D. Tóth The planar tree packing theorem . . . . 109--177
Sándor P. Fekete and Winfried Hellmann and Michael Hemmer and Arne Schmidt and Julian Troegel Computing maxmin edge length triangulations . . . . . . . . . . . . . 1--26 Moritz Baum and Thomas Bläsius and Andreas Gemsa and Ignaz Rutter and Franziska Wegner Scalable exact visualization of isocontours in road networks via minimum-link paths . . . . . . . . . . . 27--73 Zachary Abel and Erik D. Demaine and Martin L. Demaine and David Eppstein and Anna Lubiw and Ryuhei Uehara Flat foldings of plane graphs with prescribed angles and edge lengths . . . 74--93 Giordano Da Lozzo and Vida Dujmovi\'c and Fabrizio Frati and Tamara Mchedlidze and Vincenzo Roselli Drawing planar graphs with many collinear vertices . . . . . . . . . . . 94--130 Haitao Wang On the geodesic centers of polygonal domains . . . . . . . . . . . . . . . . 131--190 Bahareh Banyassady and Matias Korman and Wolfgang Mulzer and André van Renssen and Marcel Roeloffzen and Paul Seiferth and Yannik Stein Improved time-space trade-offs for computing Voronoi diagrams . . . . . . . 191--212 Jean Cardinal and Stefan Felsner Topological drawings of complete bipartite graphs . . . . . . . . . . . . 213--246 Luca Castelli Aleardi and Olivier Devillers Array-based compact data structures for triangulations: practical solutions with theoretical guarantees . . . . . . . . . 247--289 Linda Kleist Drawing planar graphs with prescribed face areas . . . . . . . . . . . . . . . 290--311 Helmut Alt and Kevin Buchin and Steven Chaplick and Otfried Cheong and Philipp Kindermann and Christian Knauer and Fabian Stehn Placing your coins on a shelf . . . . . 312--327 Christian A. Duncan and David Eppstein and Michael T. Goodrich and Stephen G. Kobourov and Maarten Löffler and Martin Nöllenburg Planar and poly-arc Lombardi drawings 328--355 Vida Dujmovi\vc and David R. Wood Thickness and antithickness of graphs 356--386 Peter Frankl and János Pach A stability theorem on cube tessellations . . . . . . . . . . . . . 387--390 Luca Castelli Aleardi and Olivier Devillers and Éric Fusy Canonical ordering for graphs on the cylinder, with applications to periodic straight-line drawings on the flat cylinder and torus . . . . . . . . . . . 391--429 Prosenjit Bose and Matias Korman and André van Renssen and Sander Verdonschot Routing on the visibility graph . . . . 430--453
Timothy M. Chan Applications of Chebyshev polynomials to low-dimensional computational geometry 3--20 Mickaël Buchet and Tamal K. Dey and Jiayuan Wang and Yusu Wang Declutter and resample: towards parameter free denoising . . . . . . . . 21--46 Csaba Biró and Édouard Bonnet and Dániel Marx and Tillmann Miltzow and Pawe\l Rz\ka\.zewski Fine-grained complexity of coloring unit disks and balls . . . . . . . . . . . . 47--80
Balázs Keszegh and Dömötör Pálvölgyi An abstract approach to polychromatic coloring: shallow hitting sets in ABA-free hypergraphs and pseudohalfplanes . . . . . . . . . . . . 1--26 Timothy M. Chan and Dimitrios Skrepetos All-pairs shortest paths in geometric intersection graphs . . . . . . . . . . 27--41 Jisu Kim and Alessandro Rinaldo and Larry Wasserman Minimax rates for estimating the dimension of a manifold . . . . . . . . 42--95 Erin Wolf Chambers and Yusu Wang Measuring similarity between curves on $2$-manifolds via homotopy area . . . . 96--126 Kolja Knauer and Daniel Gonçalves and Benjamin Leveque On the structure of Schnyder woods on orientable surfaces . . . . . . . . . . 127--163 Saul Schleimer and Arnaud de Mesmay and Jessica Purcell and Eric Sedgwick On the tree-width of knot diagrams . . . 164--180 Edouard Bonnet and Panos Giannopoulos and Michael Lampis On the parameterized complexity of red--blue points separation . . . . . . 181--206 Mark de Berg and Sergio Cabello and Otfried Cheong and David Eppstein and Christian Knauer Covering many points with a small-area box . . . . . . . . . . . . . . . . . . 207--222 Ramsay Dyer and Gert Vegter and Mathijs Hubertus Maria Johannes Wintraecken Simplices modelled on spaces of constant curvature . . . . . . . . . . . . . . . 223--256 David Eppstein Realization and connectivity of the graphs of origami flat foldings . . . . 257--280
Timothy M. Chan and Dimitrios Skrepetos Approximate shortest paths and distance oracles in weighted unit-disk graphs . . 3--20 Édouard Bonnet and Panos Giannopoulos Orthogonal Terrain Guarding is NP-complete . . . . . . . . . . . . . . 21--44 Fabian Klute and Martin Nöllenburg Minimizing crossings in constrained two-sided circular graph layouts . . . . 45--69 Kristóf Huszár and Jonathan Spreer and Uli Wagner On the treewidth of triangulated $3$-manifolds . . . . . . . . . . . . . 70--98 Jean Cardinal and Timothy M. Chan and John Iacono and Stefan Langerman and Aurélien Ooms Subquadratic encodings for point configurations . . . . . . . . . . . . . 99--126 Vincent Divol and Frédéric Chazal The density of expected persistence diagrams and its kernel based estimation 127--153
Marc van Kreveld and Maarten Löffler and Lionov Wiratma On optimal polyline simplification using the Hausdorff and Fréchet distance . . . 1--25 Gill Barequet and David Eppstein and Michael Goodrich and Nil Mamano Stable-matching Voronoi diagrams: Combinatorial complexity and algorithms 26--59 Adrian Dumitrescu and Ritankar Mandal New lower bounds for the number of pseudoline arrangements . . . . . . . . 60--92 Hugo Akitaya and Erik Demaine and Takashi Horiyama and Thomas Hull and Jason Ku and Tomohiro Tachi Rigid foldability is NP-hard . . . . . . 93--124 Robert Cyrus Haraway and III Determining hyperbolicity of compact orientable $3$-manifolds with torus boundary . . . . . . . . . . . . . . . . 125--136 Manuel Borrazzo and Fabrizio Frati On the planar edge-length ratio of planar graphs . . . . . . . . . . . . . 137--155 Omrit Filtser and Matthew Katz Algorithms for the discrete Fréchet distance under translation . . . . . . . 156--175 Braxton Osting and Sourabh Palande and Bei Wang Spectral sparsification of simplicial complexes for clustering and label propagation . . . . . . . . . . . . . . 176--211 Prosenjit Bose and Jean-Lou De Carufel and Olivier Devillers Expected Complexity of Routing in $ \Theta_6 $ and Half-$ \Theta_6 $ Graphs 212--234 Haitao Wang A Divide-and-Conquer Algorithm for Two-Point $ L_1 $ Shortest Path Queries in Polygonal Domains . . . . . . . . . . 235--282 Dingkang Wang and Yusu Wang An Improved Cost Function for Hierarchical Cluster Trees . . . . . . . 283--331 Michael Kaufmann and Michael Bekos and Fabian Klute and Sergey Pupyrev and Chrysanthi Raftopoulou and Torsten Ueckerdt Four Pages Are Indeed Necessary for Planar Graphs . . . . . . . . . . . . . 332--353 Balázs Keszegh and Dömötör Pálvölgyi Aligned plane drawings of the generalized Delaunay-graphs for pseudo-disks . . . . . . . . . . . . . . 354--370