Geombinatorics Quarterly

  • Truth, Like Water, Finds Its Way Out – By Alexander Soifer
  • The Secretive Life of the International Mathematics Union
  • Truth, like water, will find its way out: My Response to Günter Ziegler and the Deutsche Mathematiker-Vereinigung – By Alexander Soifer
  • Siegmund-Schultze Proposal of German Monopoly on the Third Reich History; by Alexander Soifer
  • The case of Dr. Danut Marcu


Soifer New

April’s Issue 1 of Volume XXVIII was a Special Issue with pioneering essays by Aubrey D.N.J. de Grey, who constructs the first ever 5-chromatic unit-distance graph; Marijn J.H. Heule, who sets 6 consecutive world records in reducing the size of such graphs; and Geoffrey Exoo and Dan Ismailescu, who are arming themselves – and us – with tools for the next big step.

You are welcome to use PayPal to start or renew your subscription.

For volume XXVIII we will have special pricing for the purchase of the volume, and for this volume only, you may purchase issue 1 individually.

Volume XXVIII can be purchased for 30% over the usual subscription rates or purchase the issue 1 only, for $29.

For all your subscription needs please contact Ms. Valerie Quarles at University of Colorado, Academic Office Bldg 117, 1420 Austin Bluffs Pkwy, Colorado Springs, CO 80918, USA or by e-mail


Soifer New
By G. Exoo and D. Ismailescu

This is Exoo’s and Ismailescu’s triangle-free, 4 chromatic unit distance graph of order 17 – a World Record.

It comes from the essay “Small Order Triangle-Free 4 Chromatic Unit Distance Graphs” that appear in the October issue (2) of Volume XXVI.