Vol XXV 2015-2016

Geombinatorics

A quarterly journal on open problems of combinatorial and discrete geometry and related areas.


July 2015 – April 2016

Issue 1, Issue 2, Issue 3, Issue 4


Table of Contents

July 2015 (Volume XXV, Issue 1)

Editors Page……………………………………………………………………………………………4

New Essays

  • A Simple Geometric Model Provides a
    Possible Quantitative Explanation of the
    Advantages of Immediate Feedback in
    Student Learning……………………………………………………………………………….22
    By Octavio Lerma, Olga Kosheleva, and
    Vladik Kreinovich
  • Coloring Regions on a Sphere to Forbid the
    Unit Distance…………………………………………………………………………..………..30
    By Christopher Maier
  • Weighted Erdös-Mordell Inequality for
    Star-shaped Polygons……………………………………………………………………..….36
    By Moshe Rosenfeld and Tran Nhat Tan

Reviews

  • A Book is Born: “Topics in Chromatic Graph Theory”
    By Robin J. Wilson and Lowell W. Beineke (ed’s)………………………………..….45
    By Alexander Soifer

 

Table of Contents

October 2015 (Volume XXV, Issue 2)

Editor’s Page………………….…………………….………………..…………..52

New Essays

  • Are All Convex Polyhedra Tetragonalizable? …………………..56
    by Branko Grünbaum
  • A Very Short Proof of a Well-known Fact About
    Circles in the Plane…………………………………………………….65
    by Peter Johnson and Matt Noble
  • A Feasible Algorithm for Checking n-Scissors
    Congruence of Polyhedra in Rd……………….…….……………..70
    by Olga Kosheleva and Vladik Kreinovich
  • Truth, like water, will find its way out:
    My Response to Günter M. Ziegler and
    the Deutsche Mathematiker-Vereinigung …….…………………76
    by Alexander Soifer

 

Table of Contents

January 2016 (Volume XXV, Issue 3)

Editor’s Page………………….…………………….……………92

New Essays

  • On a 3-Uniform Hypergraph Coloring
    Problem in the Integers……………………………………….….93
    by Loren Anderson and Peter D. Johnson Jr.
  • On Visible Tilings………………………………………………………………103
    by J.R. Burt, William Staton and Benton Tyler
  • Coloring the Real Line with Monochromatic Intervals………………………..………………………………….113
    by Doyon Kim
  • Why Injecting Fine Dust into a Tornado is more
    Promising than Injecting Coarse Dust:
    A Geometric Explanation……………….………….…………….118
    by Octavio Lerma, Olga Kosheleva and
    Vladik Kreinovich
  • Should We Accept the German Proposal of Their Monopoly
    on the Third Reich History?
    A Response to Reinhard Siegmund-Schultze……………..……123
    by Alexander Soifer

Table of Contents

April 2016 (Volume XXV, Issue 4)

Editor’s Page………………….…………………….……………140

New Essays

  • On Geometry of Finsler Causality:
    For Convex Cones, there Is No
    Affine-Invariant Linear Order
    (Similar to Comparing Volumes)……………………………………….….142
    by Olga Kosheleva and Vladik Kreinovich
  • A Generalized Isodiametric Problem……………………………………………………………151
    by Christos Pelekis
  • Coloring Blocks of Consecutive Integers
    to Forbid Three Distances………………………..………………………………….168
    by John Ryan

 Recent Books 133