memoised function ==>
<programming> (Or "memoised function") A function that remembers which
arguments it has been called with and the result returned and, if called with
the same arguments again, returns the result from its memory rather than
Memo functions were invented by Professor Donald Michie of Edinburgh University.
The idea was further developed by Robin Popplestone in his Pop2 language long
before it was ever worked into LISP.
This same principle is found at the hardware level in computer architectures
which use a cache to store recently accessed memory locations.
A Common Lisp package by Marty Hall
["'Memo' functions: and machine learning", Donald Michie, Nature, 218, 19-22,
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