Volume XXIII


Geombinatorics Quarterly

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

October 2013 (Volume XXIII, Issue 2)

Editors Page   40
New Essays    
Motif patterns and coverings of points with unit disks
Part 1
By Jeremy F. AlmNicholas HommowunElizbeth Manary and Aaron Schneider 41
Constructively coloring the line By Loren Anderson, and Peter Johnson 52
Multiplication in Newton’s Principia and Jordan-Banach Algebras I By Jaraoslaw Wawrzycki 65
Recent Books   85
Subscription Form   87

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   108
Multiplication in Newton’s Principia and Jordan-Branch Algebras II By Sharon Shelah 127
Subscription Form By Jaroslaw Wawrzycki 143

(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
Cutting Right Triangles Right! By Hidefumi Katsuura and Wasin So 170
Connected Components of Underlying Graphs of halving line By Tanya Khovanova and Dai Yang 177
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