There is no complete axiom system for shuffle expressions
There is no complete axiom system for shuffle expressions
复制标题
洗牌表达式没有完整的公理系统
DOI:
10.1051/ita:1999117
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
Andrzej Szepietowski
中科院分区:
文献类型:
--
作者:
Andrzej Szepietowski
In this paper we show that neither the set of all valid equations between shuffle expressions nor the set of schemas of valid equations is recursively enumerable. Thus, neither of the sets can be recursively generated by any axiom system.