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The injective envelope of $S$-sets
[摘要]
[发布日期]  [发布机构] 
[效力级别]  [学科分类] 数学（综合）
[关键词] $Q$-set;cardinal invariants of the continuum;pseudointersection number;$MA$($sigma$-centered);Dow's principle;almost disjoint family;almost disjointness principle;iterated forcing [时效性] 
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