On Sep 16, 2009, at 11:34 PM, lfwang wrote:
How to understand the phrase " (/ sy -2))" ? And where I can
acquire the algorithm of phrases of like it?
This is just the Scheme programming language. There are lots of
resources and tutorials about Scheme online; see:
http://ab-initio.mit.edu/wiki/index.php/Guile_and_Scheme_links
(For books, a classic is "The Little Schemer".)
The particular expression you quoted means "sy divided by -2". In
Scheme the operator comes first, then the arguments (prefix notation,
also called Polish notation).
Steven
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