Two Simple Incomplete Modal Logics
Two Simple Incomplete Modal Logics
复制标题
两个简单的不完全模态逻辑
DOI:
10.1111/j.1755-2567.1978.tb00830.x
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发表时间:
2008
期刊:
影响因子:
0.5
通讯作者:
J. Benthem
中科院分区:
文献类型:
--
作者:
J. Benthem
The modal formulas to be considered below belong to the modal propositional language with proposition letters p, q, r,..., Boolean operators 1 (negation),-+(material implication), A (conjunction), v (disjunction), c*(material equivalence) and modal operators 0 (necessarily) and 0 (possibly). The degree d (cp) of a modal formula cp is defined inductively according to the clauses (i) d (p)= 0, for proposition letters p,