Last updated by The POOG on Octobere 18, 2021.

The following tools have been found useful in building this site and in ongoing research:


  • arXiv is a free distribution service and an open-access archive for 1,854,076 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.


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I was informed of some of these tools in unsolicited emails to ‘admin’. The sender had to be human and not a robot to have understood site structure. Use at your own risk. The sites have no ‘about’ information. The first thing I ask myself when I encounter any new site or product is “How do they make their money?” since everything has a cost including this site (I don’t make any money as I write this).

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