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Integral points on elliptic curves over number fields. (English) Zbl 0881.11054
This paper extends the elliptic logarithm method of finding all integral points on a given model of an elliptic curve defined over $$\mathbb{Q}$$ [see R. J. Stroeker and N. Tzanakis, Acta Arith. 67, 177-196 (1994; Zbl 0805.11026), J. Gebel, A. Pethö and H. G. Zimmer, Acta Arith. 68, 171-192 (1994; Zbl 0816.11019) and N. P. Smart, Proc. Camb. Philos. Soc. 116, 391-399 (1994; Zbl 0817.11031)] to the class of elliptic curves defined over an algebraic number field. As David’s lower bound for linear forms in elliptic logarithms [S. David Mém. Soc. Math. Fr., Nouv. Sér. 62 (1995; Zbl 0859.11048)], which is essential for the elliptic logarithm method to work, also applies to arbitrary algebraic number fields, this extension is from a general point of view rather straightforward. Only as far as explicit knowledge of the structure of the number field is needed in each individual case, difficulties may arise, especially where rank and the construction of a Mordell-Weil basis are concerned. This paper closes with three well-chosen examples, two in which a quadratic extension of $$\mathbb{Q}$$ and one in which a cubic number field is considered.

##### MSC:
 11G05 Elliptic curves over global fields 14H52 Elliptic curves 11Y16 Number-theoretic algorithms; complexity 11D25 Cubic and quartic Diophantine equations
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