Pell's equation
... that the solution to Pell's equation was mistakenly attributed to mathematician John Pell?
... that the solution to <b id="mwAqA"><a href="./Pell's_equation" id="mwAqE" rel="mw:WikiLink" title="Pell's equation">Pell's equation</a></b> was mistakenly attributed to mathematician <a class="mw-disambig" href="./John_Pell" id="mwAqI" rel="mw:WikiLink" title="John Pell">John Pell</a>?