to 
I find it hard to write about actual trees in a paper/ grant we are currently working on. Trees are so common to comp/neuro and ML that it is hard to see trees as having green leaves as opposed to structures where vertices are connected by exactly one path.
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I love it. Helps having physics background I think
Hahaha - well good thing I have a physics background then! 
I’m just reading it for fun at the moment, in my spare time. He’s got a few problems, I just probably need to try them out. 
Good to know I’m reading the right sorts of stuff. 
