Adding linear orders
Adding linear orders
复制标题
添加线性阶次
DOI:
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发表时间:
2011
期刊:
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通讯作者:
Pierre Simon
中科院分区:
文献类型:
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作者:
S. Shelah;Pierre Simon
Abstract We address the following question: Can we expand an NIP theory by adding a linear order such that the expansion is still NIP? Easily, if acl(A)=A for all A, then this is true. Otherwise, we give counterexamples. More precisely, there is a totally categorical theory for which every expansion by a linear order has IP. There is also an ω-stable NDOP theory for which every expansion by a linear order interprets pseudofinite arithmetic.