a-n-complements conjecture
a-n-complements conjecture
Let be a nonnegative real number. An -lc over -complement of is assumed in the cited complement theorems. An --complement is an -complement such that is -lc over .
--complements conjecture. Under the additional assumption that has an -lc over -complement, the cited complement theorems should yield an --complement with . The set of complementary indices may depend on ; restrictions on complementary indices are expected to hold for , but not for approximations when is irrational. The same is expected for Alexeev pairs of index .
This is an -lc strengthening of the existence and boundedness theory for complements. It remains open in the generality stated, and the source notes that the dependence on irrational requires weaker conclusions for approximations.
Sources & referencesView supporting material
Primary source
V. V. Shokurov, “Existence and boundedness of n-complements”, arXiv:2012.06495 (2020).
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