>>486
リンク先の30頁に

So we know that e^4 is irratioinal; to show that e^3 , e^5 etc. are irrational as well,
we need heavier machinery (that is, a bit of calculus), and a new idea - which essentially
goes back to Charles Hermite, and for which the key is hidden in the collowing simple lemma.

とあるだろ。

どこに「eの二乗と同じやり方で偶数乗の証明が可能だと」と書いてある？