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Abel equation  

Definition

  • The Abel equation, named after Niels Henrik Abel, is a type of functional equation of the form f(h(x))=h(x+1) or α(f(x))=α(x)+1. The forms are equivalent when α is invertible. h or α control the iteration of f. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Abel_equation)

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http://data.loterre.fr/ark:/67375/MDL-PNPDZLJK-F

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