The removal of from some undecidable problems involving elementary functions

The removal of from some undecidable problems involving elementary functions
复制标题

消除一些涉及初等函数的不可判定问题

DOI:
--
复制
发表时间:
2002
期刊:
影响因子:
--
通讯作者:
M. Laczkovich
M. Laczkovich
中科院分区:
--
文献类型:
--
作者:
M. Laczkovich

文献摘要

被引文献

相似文献

我们证明了在由整数和函数x生成的环中;sinx (n)和sinx。sin x(n)) (n = 1,2,…)定义在R上的函数是正数还是有根是不确定的。我们还证明了指数场C的存在论是不确定的。
We show that in the ring generated by the integers and the functions x; sin x(n) and sin(x . sin x(n)) (n = 1, 2,...) defined on R it is undecidable whether or not a function has a positive value or has a root. We also prove that the existential theory of the exponential field C is undecidable.