Flexagons


Biggest Problem - Find the traverse for the nona and the dodeca hexaflexagon when the V-flex is included.

    Newest results summarizing the new paper that was included in the Martin Gardner trbute by CMJ. CMJ

  • 2010, posted 7/22/2011 Hua Wang - The number of pats of degree 3n+1 is C(4n,n)/(3n+1) and of degree 3n+2 is 2*C(4n+1,n)/(3n+2). |C(n)| = C(3n+2,5)/3 + 2n/3. C(n) is explained on Page 2, while C(n,r) is the combination of n things taken r at a time.
  • 2010 posted 7/22/2011 Ionut E. Iacob - New Triangle States Transition graph.
  • 2/1/2011 Ionut Emil Iacob's latest applet for flexagons of various sizes.
  • 6/26/2010 I do not have a proof that all regular flexagons can be translated by 1 and Ralph Jones pointed this out to me recently. I ignored this fact in our recent paper, "The combinatorics of all regular flexagons." In 1979, I gave a constructive proof that it was true for the hexahexaflexagon. Today, with some help from Emily McLean and a java program, I found a similar demonstrative proof for the nonahexaflexagon. Thus I can really say that the nonahexaflexagon has 2,718,576 mathematical faces. I refer you to the applet at the very bottom of Page 2 below figure 17. Use these directions or the graph directly below. When using the nonahexaflexagon applet at the bottom of Page 2, start by clicking the 'See' button. Then click the 'See' button after every flex. The left side of the above directions show the Main Cardioid for the nona. The right side provides a different path to face 9 of the Main Cardioid. Face 12 of the alternate path is a 13 translate of the first one. Since 13 and 27 are relatively prime, we really can translate any nona face by any amount making the effort worthwhile in the 2010 paper. The translates in 1979 were easy to find and I made the assumption that they would be easy to find in the nona and the dodeca. Unfortunately we had to use a java program that looked at more than 4000 of the 100698 initial faces before we found the first one that appears in the 'directions' above.

  • Small portion of the Nonahexaflexagon V-traverse
    Page 2 results.


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    This page was created 12/1/2006 and last updated 10/4/2011. Page contributors include Bruce McLean, Emily McLean, Thomas Anderson, Chasen Smith, Homeira Pajoohesh, Ionut Emil Iacob, John Nelson, and Hua Wang.