1971
DOI: 10.1002/mana.19710480130
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Die elliptischen Kurven mit den Führern 3.2m und 9.2m

Abstract: In der vorliegenden Note wird eine vereinfachte Herleitung der Resultate von OGG [3] gegeben.Fur jede Primzahl p und eine normale Erweiterung K/Q sei ep die Verzweigungsordnung und fp der Restklassengrad von p in K/Q. Behauptung 1 ([3], Abschnitt 2 , Proposition). Sei K / Q normal vom Grade 3 oder 6 . Wenn ep = 1 oder 2 fur alle p , dann ist die Klassenzahl des Teilkiirpers k, iiber dem K zyklisch vom Grade 3 ist, durch 3 teilbar.Behauptung 2. Sei Gal (K/Q) G G3, 3 zahm-verzweigt ; fur alle p =+= 3 sei ep = 3 … Show more

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Cited by 3 publications
(7 citation statements)
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“…For p = 3, Ogg [6] has found all the curves of conductor 2V = 3 2 m and 9 2 m by showing that they have a rational point of order 2 (cf. [4]), and Coghlan has found in his thesis all the curves of conductor N = 2 m 3 n . For example, if N -2 m 5 in our case, then 2 <^ m <; 7 and there are 56 curves with a rational point of order 2.…”
Section: Remarkmentioning
confidence: 93%
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“…For p = 3, Ogg [6] has found all the curves of conductor 2V = 3 2 m and 9 2 m by showing that they have a rational point of order 2 (cf. [4]), and Coghlan has found in his thesis all the curves of conductor N = 2 m 3 n . For example, if N -2 m 5 in our case, then 2 <^ m <; 7 and there are 56 curves with a rational point of order 2.…”
Section: Remarkmentioning
confidence: 93%
“…The only non-zero integral solutions of the equations below for a given odd prime p are as follows: 1) // X 2 -1 = 2V, then (|X|, 2ψ) = (2,3), (3,2 3 ), (5,2 3 3), (7,2 4 3), (9,2*5),…”
Section: Lemmamentioning
confidence: 99%
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“…As remarked above, the determination of all elliptic curves with given conductor can be reduced to a problem on solving diophantine equations. Various authors (Ogg [23], [25], Coghlan, Neumann [20], [19], [21]) have dealt with the cases TV = 2a3* and other cases involving only small primes by showing that the elliptic curves possess rational points of small order. Setzer [29], and .Neumann [21], [22] deal with many cases of prime conductor by showing that for p =£ 2, 3, 17 there is an elliptic curve conductor p defined over Q with a rational point of order 2 if and only if p = «2 + 64 for some integer «.…”
mentioning
confidence: 99%