Explanation of Independence
Explanation of Independence
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独立性的解释
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
Hans Adler
中科院分区:
文献类型:
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作者:
Hans Adler
An axiomatic treatment of `independence relations' (notions of independence) for complete first-order theories is presented, the principal examples being forking (due to Shelah) and thorn-forking (due to Onshuus). Thorn-forking is characterised in terms of modular pairs in the lattice of algebraically closed sets. Wherever possible, forking and thorn-forking are treated in a uniform way. They are dual in the sense that forking is the finest (most restrictive) and thorn-forking the coarsest independence relation worth examining. We finish by defining the kernel of a sequence of indiscernibles and studying its relation to canonical bases.