On equations inS-units and the Thue-Mahler equation
On equations inS-units and the Thue-Mahler equation
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DOI:
10.1007/bf01388644
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发表时间:
1984-10
影响因子:
3.1
通讯作者:
J. Evertse
中科院分区:
文献类型:
--
作者:
J. Evertse
Several classes of diophantine equations, such as the Thue-Mahler equation and certain generalisations of the Ramanujan-Nagell equation, can be reduced to certain linear equations in two S-units. Here S is a finite set of equivalence classes of valuations on a given algebraic number field K and an S-unit is an element eeK with the property that the only valuations on K which assume a value 4= 1 for e belong to equivalence classes from S. In this section we shall state a general result on the number of solutions of linear equations in two S-units. Before we can state it, we have to introduce some notions on valuations. In w we shall discuss the consequences of our general result for generalisations of the Ramanujan-Nagell equation and in w167 3-4 we shall deal with the Thue-Mahler equation.Let K be an algebraic number field. By a prime on K we shall mean an equivalence class of non-trivial valuations on K. Usually we shall denote primes on Q by the letter p, on a given algebraic number field K by v and on an extension of K by V. The completion of K at the prime v is denoted by K v. We distinguish between finite primes, containing non-archimedean valuations, and infinite primes, containing archimedean valuations. Furthermore, an infinite prime is called real if K,,= F, and complex if Kv= C. Finally, the set of primes on K is denoted by M K.