[Nauty-list] "geng -u -d2 -D2 29" problem

Gordon Royle gordon at csse.uwa.edu.au
Wed Sep 19 11:17:23 EST 2007

I get the same as Keith..

Diving boldly into the code for "geng", what happens is that when  
n=29, main() calls "spaextend" and this function simply finishes  
without calling itself (or anything else) any more times... inside  
spaextend there is a conditiion

for (ixx =0; ixx < xlim; ++ix) {

.. recursive calls to spaextend


but at this point xlim = 0 and so there is no recursion..

When n=28, the function "genextend" is called instead which works  

Associate Professor Gordon Royle
Department of Computer Science & Software Engineering
University of Western Australia

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