摘要
设d无平方因子,h(d)是二次域的类数。本文证明了:在方程U ̄2-dV ̄2=4,(U,V)=1有整数解时,丢番图方程4x ̄(2n)-dy ̄2=-1,n>2无|y|>1的整数解;如果正整数a,k,n满足,k>1,n>2且而是Pell方程x ̄2-dy ̄2=-1的基本解,则h(d)≡0(modn)。
Let d be a positive integer which is square free,h(d)be the class number of thereal quadratic field.In this paper,we prove that(1)if the equation U ̄2-dV ̄2=4 hasinteger solution with(U,V )=1,then the diophantine equation 4x ̄(2n)-dy ̄2=-1,n>2 hasno solution in positive integers,except d = 5,2=y=1;(2)if the positive integers a,k,nsatisfy,n> 2 and is the fundamental solution of Pell′s equationx ̄2-dy ̄2=-1,Then h(d)≡0(mod n).
出处
《数学学报(中文版)》
SCIE
CSCD
北大核心
1994年第5期625-631,共7页
Acta Mathematica Sinica:Chinese Series
关键词
类数
丢番图方程
实二次域
可除性
class numbers,Diophantine eqnations,real quadratic field