A Problem of Normal Form in Natural Deduction
A Problem of Normal Form in Natural Deduction
复制标题
自然演绎中的范式问题
DOI:
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复制
发表时间:
2000
影响因子:
0.3
通讯作者:
J. Plato
中科院分区:
文献类型:
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作者:
J. Plato
Recently Ekman gave a derivation in natural deduction such that it either contains a substantial redundant part or else is not normal. It is shown that this problem is caused by a non-normality inherent in the usual modus ponens rule.