I am building a collection of pointers to
related to constraints — books, software, videos, etc., etc.
This collection is a “work in progress” and probably always will be. I am giving my loyal blog readers a first look. 🙂
The collection is built using the Pearltrees curation tool. If you sign up for a free Pearltrees account, it will remove the banner urging you to do so.
The collection is organized hierarchically, and one can click on items and use the navigation arrows to browse through it. Notice the Zoom option in the lower right corner.
I welcome feedback and suggestions.
Gene Freuder 
Thank yoiu Gene for the rich documentation and references in the Resources link. I ‘ve appreciated also the “Satisfaction song” of the Rolling Stones. Congratulations!