The GG conjecture on singularities after resolving the discriminant locus
The GG conjecture on singularities after resolving the discriminant locus
Let be a projective complex variety of dimension , let be a very ample invertible sheaf, and let be a non-torsion primitive Hodge class. For an integer , set . A resolution of the discriminant locus is a projective variety with a birational morphism such that the inverse image of the discriminant locus is a divisor with normal crossings. If is a Deligne cohomology class mapping to , write for the associated normal function.
GG conjecture. For every non-torsion primitive Hodge class , there is an integer and a resolution of the discriminant locus such that, for any Deligne cohomology class mapping to , is singular on .
This strengthens the expectation that primitive Hodge classes give rise to singular normal functions by requiring singularity after a resolution of the discriminant locus and for every Deligne lift of the class. The supplied text gives no resolution status.
Sources & referencesView supporting material
Primary source
Patrick Brosnan, Hao Fang, Zhaohu Nie and Gregory Pearlstein, “Singularities of admissible normal functions”, arXiv:0711.0964 (2008).
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