Ideal 9th-order Multigrades and Letac's Elliptic Curve
نویسنده
چکیده
By showing that the elliptic curve (x2 13)(y2 13) = 48 has infinitely many rational points, we prove that Letac's construction produces infinitely many genuinely different ideal 9th-order multigrades. We give one (not very small) new example, and, by finding the Mordell-Weil group of the curve, show how to find all examples obtainable by Letac's method.
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تاریخ انتشار 2010