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.
References
Primary source
Patrick Brosnan, Hao Fang, Zhaohu Nie and Gregory Pearlstein, “Singularities of admissible normal functions”, arXiv:0711.0964 (2008).
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