all the branches of a tree at every stage of its height when put together are equal in thickness to the trunk
-- https://www.insidescience.org/news/uncovering-da-vincis-rule-trees
More on primary mathematics
When I was in school, I was having problems with algebra and he (Hale) tutored me and gave me a book he had written, and signed, which was titled “Practical Applied Mathematics.” I still have the book, which was published in 1915, and I cherish it.
-- Gary Ernest Davis, Republic of Mathematics, 2011
The book: PAM, Hale
Mathematical glossary: David Tall
Mathematics of clock making: http://www.ams.org/publicoutreach/feature-column/fcarc-stern-brocot
Haskell vs Ada vs C++ - an experiment in prototyping productiviti AD 1994: http://haskell.cs.yale.edu/wp-content/uploads/2011/03/HaskellVsAda-NSWC.pdf
Representing knowledge graph embeddings: https://github.com/Accenture/AmpliGraph
