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A fact from Barnsley fern appeared on Wikipedia's Main Page in the Did you know column on 21 January 2010 (check views). The text of the entry was as follows:

Did you know
- ... that the Barnsley fern (pictured) was first described by and named after a mathematician, and despite its name, it is not a real fern?
A record of the entry may be seen at Wikipedia:Recent additions/2010/January.

Wikipedia

nice article - well done Victuallers (talk) 14:29, 19 January 2010 (UTC)[reply]

Suspect a small error?

" ... Barnsley's fern uses four affine transformations. The formula for one transformation is the following: ..." Uhh, to my limited mathematics, the formula is the same for all four transformations. The difference between them is the factors in the matrix (abcd values). The sentence should therefore read: " ... The formula for the transformations is the following: " Old_Wombat (talk) 11:07, 15 May 2011 (UTC)[reply]

Formula is different for each of 4 transformation. We can talk about general transformation with named coeeficient, but this is just abstract thing. Concrete transformation have concrete coefficients. So, there is no error in article.