The rationality conjecture for a Du Bois divisor
Let be a reduced scheme of finite type over a field of characteristic zero, and let be a Cartier divisor with Du Bois singularities. Assume that has rational singularities.
Rationality conjecture for a Du Bois divisor. Then has rational singularities, and in particular is Cohen–Macaulay.
This is proposed as a conjectural generalization of the result that a Du Bois Cartier divisor with smooth complement forces the ambient variety to have rational singularities. The source gives no resolution of this stronger statement.
References
Primary source
Sándor J. Kovács, “Singularities of stable varieties”, arXiv:1102.1240 (2012).
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