News for hackers. Stuff that matters.
Re:What is “Open Recursion”? by agumonkey on Wednesday July 19, 2017 @02:32AM (#14802351)
I would prefer other sources of information. Like papers from 60s to 80s.
Re:What is “Open Recursion”? by barrkel on Wednesday July 19, 2017 @05:42AM (#14803058)
http://repository.readscheme.org/ftp/papers/ai-lab-pubs/AIM-... (Lambda: The Ultimate Imperative, Steele & Sussman 1976)

Pay attention to page 17 and subsequent pages, talking about variable binding in a closed or open context - this is the closing that closure refers to. Page 31 talks about closure in the context of a lambda.