Bounded-discrepancy hypersurface singularity conjecture

Let (XP)(X\ni P) be an nn-dimensional (n3)(n\ge 3) canonical (log canonical) hypersurface singularity. Let ff be a log resolution and suppose

min{a(E,0)f(E)=P}n2.\min\{a(E,0)\mid f(E)=P\}\ge n-2.

Bounded-discrepancy hypersurface singularity conjecture. There exists a hyperplane section HH such that (X,H)(X,H) is plt (lc). Hence (XP)(X\ni P) is not weakly exceptional (not exceptional) singularity. The claim concerns the relationship between discrepancies of hypersurface singularities and the existence of hyperplane sections with prescribed singularity type. The cited source is presented as support for the assertion, but its resolution status is not established in the supplied text.

Sources & referencesView supporting material

Primary source

S. A. Kudryavtsev, “On exceptional terminal singularities”, arXiv:math/0111303 (2001).

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