[ASipos]

Come on, this is a myth. I work in math and it is not at all unusual to cite informal sources.

Also, someone should inform Greg Egan: http://www.gregegan.net/SCIENCE/Superpermutations/Superpermu...

[JdeBP]

Itself discussed at https://news.ycombinator.com/item?id=18271265 .

[jessriedel]

Yea, this is also something that is not unique to the internet age. Academics have been (imperfectly) assigning credit to informal contributions since there have been citations (and before!). Footnotes like "I thank B. Johnson for this argument" have always been used.

[empath75]

If you click through the links, he's in the google groups thread talking about it.

[ASipos]

Thanks! For those interested, the link is https://groups.google.com/forum/m/#!topic/superpermutators/j...