Deletion of Cyclic function

Comment: I'm still not convinced there is a notable topic for an article here.  The sources cited in the current article are clearly pretty marginal (an ''Art of Problem Solving'' blog post, a dictionary, and an entire book entitled "Intermediate algebra" also published by AoPS).  Such sources alone do not establish notability.  |Even the most permissive criteria actually require ''independent'' sources, and we do not have suitably independent sources here.  The chant of "Google it" turns up very little of relevance to the subject of ''this article''.  For example, one of the google hits refers to the "cyclic function of the kidneys".  That has nothing whatsoever to do with the subject of this article.  Many other Google and scholar hits are of this kind, or are incidental combinations of the words "cyclic" and "function".  So, absent more solid and specific sourcing, I am inclined to vote delete
Stance: delete
Cited policy: Wikipedia:Notability (WP:GNG)