Timeline for answer to Has Fermat's Last Theorem per se been used? by Chandan Singh Dalawat

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Aug 27, 2013 at 12:58	comment	added	Chandan Singh Dalawat		It is mentioned in the link in my first comment.
Aug 27, 2013 at 12:56	comment	added	Colin McLarty		Thanks. This led me to a cleaner more general paper by Hellegouarch, Points d’ordre 2p sur les courbes elliptiques. Acta Arith. 26 (1974/75), no. 3, 253–263. MR0379507 (52 #412).
Aug 27, 2013 at 12:20	comment	added	Chandan Singh Dalawat		In what follows $A$ is an elliptic curve defined over the field of fractions $K$ of a Dedekind ring $R$, and all the points of order $2$ on $A$ are defined over $K$. A rational prime $p$ is said to be "idoine'' if $(−2)^m\equiv−1\mod p$ for some integer $m$. When $R=\mathbf{Z}$, the rational integers, it is shown that there is no point of order $p^2$ defined over $K$, where $p$ is an idoine prime, provided that Fermat's equation $x^p+y^p=z^p$ is insoluble. (ams.org/mathscinet-getitem?mr=274451)
Aug 27, 2013 at 11:59	comment	added	Colin McLarty		I Have been reading Hellegouarch but he says much less about the Fermat equations than I expected. He cites and uses many results on elliptic curves but can you point me to some place where he uses a then known case of FLT? Thanks.
Aug 27, 2013 at 10:23	comment	added	Chandan Singh Dalawat		See for example math.unicaen.fr/~nitaj/hellegouarch.html.
Aug 27, 2013 at 10:14	history	answered	Chandan Singh Dalawat	CC BY-SA 3.0