Vol XXIII 2013-2014

Geombinatorics

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

Vol XXIII, Issues 1-4

July 2013 – April 2014


 Volume 1, Volume 2, Volume 3, Volume 4


Table of Contents

July 2013 (Volume XXIII, Issue 1)

Editors  Page…………………………………………………4

New Essays

  •  Revisiting “Small unstretchable  simplicial
    arrangements of pseudonliens”
    By Branko Grünbaum…………………………………..5
  • Translative Packing of Unit Squares
    By James Januszewski…………………………………12
  • Unique Tournaments and Radar Tracking
    By Tanya Khovanova………………………………….16
  • Extreme Intersection Points in Arrangements
    By Rom Pinchasi……………………………………….28

 

Subscription Form…………………………………35


Table of Contents

October 2013 (Volume XXIII, Issue 2)

Editors  Page……………………………………………………….40

New Essays

  • Multiplication in Newton’s Principia and Jordan-Banach Algebras I
    By Jaraoslaw Wawrzycki………………………………….65

Recent Books……………………………………………….85

Subscription Form………………………………………….87


Table of Contents

January 2014 (Volume XXIII, Issue 3)

Editors Page……………………………………………92

New Essays

  • Enumeration of Triangles and convex quadrilaterals via compositions and Grunbaum’s angle-side reciprocity
    By Orlando B. Alonso………………………….94
  • The Heart of a Triangle
    By Vlastimil Dlab……………………………….103
  • Ordered Black Boxes: Existence
    By Sharon Shelah……………………………..108
  • Multiplication in Newton’s Principia and Jordan-Branch Algebras II
    By Jaroslaw Wawrzycki………………………127

Subscription Form………………………………143


Table of Contents

(Volume XXIII, Issue 4)

Editor’s page………………………………………….148

New Essays

  • Equilateral k-Isotoxal Tiles
    By R. Chick and C. Mann……………………149
  • Rainbow Colorings of Some Geometrically Defined Uniform Hypergraphs In the Plane
    By Brent Holmes………………………………158

Book Reviews

  • Einstein’s Cocktail of Profundity & Humor, A Review of
    Albert Einstein, The Human Side: Glimpses from His Archives
    by Albert Einstein; Helen Dukas Banesh Hoffmann (ed’s)
    By Alexander Soifer……………………………186

Subscription Form…………………………………191