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Revision 34300 of "Year_in_Review_9th_Century" on enwiki

Do we need separate pages on [[injective function]]s, [[surjection]]s, and [[bijection]]s, or should they just be #REDIRECTed here?

I think we should probably break up this article and distribute the information to the various articles about injections, surjections and bijections. [[user:AxelBoldt|AxelBoldt]]

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