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Graph mining with a faulty oracle

Pythia was a powerful and respected woman in Ancient Greece. She was the high priestess of the Temple of Apollo at Delphi. I was surprised to read in the Wikipedia article that the name Pythia is derived from the verb πύθειν (púthein) which means “to rot”; I find this to be unlikely. An etymology that sounds […]

WWW 2018

I am blogging from Lyon where I find myself for the Web Conference 2018.  So far, I’ve attended many interesting talks. I enjoyed a lot Jon Kleinberg’s talk on procrastination. George Akerlof noticed that instead of sending a package by mail with one time-effort of cost , he preferred to postpone this every day until […]

Risk aversion and uncertain graphs

     Let’s say that you have 100$ and you want to invest your money wisely. There are two hedge funds that interest you, both of which have the same expected return. How should you invest your 100$? Does it matter if you split it in half, or if you invest all of your money […]