Volume XXXVI: 2026

CONTENTS XXXVI (1) - July 1, 2026

 

  1. Editors Page

    Page 4

  2. Structural Analysis of k-Isohedral Tilings of Convex Pentagons: The Cases k = 2  and k = 3.

    by Shintaro Sakai, Page 5

  3. Fifty Years Anniversary of the Four-Color Theorem

    by Alexander Soifer, Page 24

  4. Three Applications of Geometric Reasoning: Why Metastasis Is Mainly Caused by  Elongated Cancer Cells? How Body Shape Affects Curiosity?  Why Ring Fractures in Ice?

    by Julio C. Urenda, Olga Kosheleva and Vladik Kreinovich, Page 38

  5. Books

    Page, 46

  6. For Subscription Needs

    For subscription needs, visit Geombinatorics Store where you can purchase the current subscription, buy past volumes, etc. https://secure.touchnet.net/C20369_ustores/web/store_cat.jsp?STOREID=5&CATID=63
     

    To submit your paper please, consult here:
    https://geombinatorics.uccs.edu/archive/index.php/home/Submissions

     

     

CONTENTS XXXVI (2) - October 1, 2026

 

  1. Editor's Page

    Page 52

  2. Bounding the harmonic mean of the packing and covering densities of centrally symmetric convex disks

    by William Han and Dan Ismailescu,  Page 53

  3. Rook Domination on Hexagonal Triangle Boards.

    by Heiko Harborth and Hauke Nienborg, Page 72

  4. MacMahon Cubes and Moshe’s Insanity, Puzzle 1

    by Moshe Rosenfeld, Page 78

  5. Structural Constraints on k-Isohedral Tilings of Convex Pentagons: The Case k ≥ 4 and the Nonexistence of Aperiodic Tilings

    by Shintaro Sakai, Page 83

  6. A Beautiful Child of the Four-Color Conjecture

    by Alexander Soifer, Page 95

  7. Recent Books

    Page 98

  8. For Subscription Needs

    Visit Geombinatorics Store where you can 
    purchase the current subscription, buy past volumes, etc.:
    https://secure.touchnet.net/C20369_ustores/web/store_cat.jsp?STO
    REID=5&CATID=63

    To submit your paper please, consult here:
    https://geombinatorics.uccs.edu/archive/index.php/home/Submissi
    ons