Carl Linnaeus end of his life he timidly advanced the hypothesis that all the species of one genus constituted at the creation one species; and from the last edition of his "Systema Naturæ" he quietly left out the strongly orthodox statement of the fixity of each species, which he had insisted upon in his earlier works. ... warnings came speedily both from the Catholic and Protestant sides. The mathematical PageRank algorithm, applied to 24 multilingual Wikipedia editions in 2014, published in "PLOS ONE" in 2015, placed Carl Linnaeus at the top historical figure, above Jesus, Aristotle, Napoleon, and Adolf Hitler (in that
Structure (category theory) answered, as best we can by Cayley's theorem. The analogue in category theory is the Yoneda lemma. One concludes that knowledge on the 'structure' is bound up with what we can say about the representable functors on "C". Characterisations of them, in interesting cases, were sought in the 1960s, for application in particular in the moduli problems of algebraic geometry; showing in fact that these are very subtle matters. Structure (category theory) In mathematics, progress often consists of recognising the same structure in different contexts, so that one method exploiting it has multiple applications. In fact this is a normal