Frank Wagner's Baldwin–Saxl conjecture for type definable groups
Frank Wagner's Baldwin–Saxl conjecture for type definable groups
Let be a dependent theory. A group is type definable if it is defined by a possibly infinite collection of formulas. Let be a type, and let be an indiscernible sequence such that .
Frank Wagner's conjecture. There is some such that, for every finite set , the intersection
is equal to a sub-intersection involving of the groups .
This is the proposed extension of the Baldwin–Saxl chain condition from definable groups to type definable groups in dependent theories. The statement is presented as the main motivation for the open question of whether infinite type definable fields in dependent theories are Artin–Schreier closed; its resolution status is not specified in the source.
Progress summary
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Sources & referencesView supporting material
Primary source
Itay Kaplan and Saharon Shelah, “Chain conditions in dependent groups”, arXiv:1112.0807 (2012).
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