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...oshy, Thomas|chapter=Candido's Identity and the Pell Family|title=Pell and Pell-Lucas Numbers with Applications|year=2014|page=169|url=https://books.google ...

He was born in [[Braunschweig]] in [[Germany]], but the family moved to [[Copenhagen]] in 1771 when his father Johan Philip Degen got a po ===The Pell equation=== ...

For a family of good rational approximations, the square root of 7 can be expressed as t ...s equation]]<ref name=conrad>{{cite web |last1=Conrad |first1=Keith |title=Pell's Equation II |url=https://kconrad.math.uconn.edu/blurbs/ugradnumthy/pelleq ...

...ref>{{Cite journal|first=Vera W.|last=de Spinadel|title=The metallic means family and multifractal spectra|journal=Nonlinear analysis, theory, methods and ap ...e starting with <math>x_0=0</math> and <math>x_1=1</math> are called the [[Pell number]]s. ...

...t levels of [[Infinite set|infinity]], shows an understanding of [[Indexed family|indices]], as well as [[logarithms]] to [[base 2]], and computes [[square r ...avala method]]'' which was the first generalized solution of so-called ''[[Pell's equation]].'' ...

...t12=C L M.|last13=Wardlaw|first13=J. M.|last14=Gallacher|first14=J.|last15=Pell|first15=J.|last16=McIntosh|first16=A. M.|last17=Smith|first17=D. J.|last18= ...apohl2016">{{cite journal|doi=10.1038/mp.2015.2|title=Genetic link between family socioeconomic status and children's educational achievement estimated from ...