Langbahn Team – Weltmeisterschaft

Bogomolov–Sommese vanishing theorem

In algebraic geometry, the Bogomolov–Sommese vanishing theorem is a result related to the Kodaira–Itaka dimension. It is named after Fedor Bogomolov and Andrew Sommese. Its statement has differing versions:

Bogomolov–Sommese vanishing theorem for snc pair:[1][2][3][4] Let X be a projective manifold (smooth projective variety), D a simple normal crossing divisor (snc divisor) and an invertible subsheaf. Then the Kodaira–Itaka dimension is not greater than p.

This result is equivalent to the statement that:[5]

for every complex projective snc pair and every invertible sheaf with .

Therefore, this theorem is called the vanishing theorem.

Bogomolov–Sommese vanishing theorem for lc pair:[6][7] Let (X,D) be a log canonical pair, where X is projective. If is a -Cartier reflexive subsheaf of rank one,[8] then .

See also

Notes

  1. ^ (Michałek 2012)
  2. ^ (Greb, Kebekus & Kovács 2010)
  3. ^ (Esnault & Viehweg 1992, Corollary 6.9)
  4. ^ (Kebekus 2013, Theorem 2.17)
  5. ^ (Graf 2015)
  6. ^ (Greb et al. 2011, Theorem 7.2)
  7. ^ (Kebekus 2013, Corollary 4.14)
  8. ^ (Greb et al. 2011, Definition 2.20.)

References

Further reading