MathOverflow’s primary goal is for users to ask and answer research level math questions, the sorts of questions you come across when you’re writing or reading articles or graduate level books. Of course, individual questions don’t have to be worthy of an article, and they don’t have to be about new mathematics. A typical example is, “Can this hypothesis in that theorem be relaxed in this way?”
You answer the question, vote on the merits of the questions, and ask questions while the website logs the activity. Then you get a ranking like in a mmorpg with Tao, Gowers, and Thurston in the population. Like the concept, there should be one for applied FinQuant but I suspect the field is too proprietary and secretive. The Mathoverflow leader board reminds me of the IT Crowd when Jen exclaims delightedly “The elders of the internet know who I am?”, here.
Math Online, here. Comprehensive collection of texts and lecture notes classified by topic.
Noahpinion, Thursday Roundup, here.
Scale of the Universe, here. Cool app with new age background music. Don’t know why HFT doesn’t have a version of this app.
Farnam Street, Taleb’s reading suggestions, here.
Marketplace, ’London Whale’ taking big bets in debt market, here. Sounds like a JPM credit trader sold a bunch of CDX in size so he gets a tag. London Whale? How could that not have a happy ending? “And from that day forward everyone in The City reverently and awesomely called your grandfather “The London Whale,” goodnight sleep tight”?