Tag Archives: switching classes

Easy to state, hard to solve?

I described here how Pablo Spiga and I showed that all but finitely many nontrivial switching classes of graphs with primitive automorphism group contain a graph with trivial automorphism group, and found the six exceptions. (The trivial switching classes are … Continue reading

Posted in exposition, open problems | Tagged , , , , , | Leave a comment

Quieter times

Things have been a little quieter for the last couple of weeks. Tomorrow, off to Portugal for a week and a half, then the Czech Republic for a week, then a couple of weeks to catch my breath before New … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment