I was hoping this would be a result on graphs representing causal relations that showed some nice properties, such as simplicity (though that would have been pr

I was hoping this would be a result on graphs representing causal relations that showed some nice properties, such as simplicity (though that would have been pretty obvious). Instead, it's a good introduction to causal ordering and the kind of techniques used to guarantee causal receiving between distributed nodes. The only thing I can't see is what is "novel" in the paper - the diagrams are all great visualisations, but which one was developed by the author? The trees?