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August 18, 2016
June 23, 2016
January 28, 2013
August 31, 2011
November 13, 2009
add some fluff to the intro
+462
add some examples. this article is still completely inaccessible to the uninitiated and probably requires the attentions of an expositor more gifted than i, but i'll look again later
+1,569
October 1, 2009
→In Pure Mathematics: Mention contravariance. Mathematical functors are cool; computer language functors less so.
+228
Computer science use of the term. Should there be a disambiguation page?
+835
rewrite, add example
+1,260