A Fano type contraction is a projective surjection 
of normal integral varieties with 
, where 
is of Fano type over 
. This means that an effective rational boundary 
exists with 
Kawamata log terminal and 
relatively ample. Its witnessing boundary can differ
from a boundary specified in a theorem.
Fano Type Contraction
See also
Bounded Klt Complement Conjecture, Cartier Divisor, Fano Contraction, Kawamata Log Terminal Pair, Log Canonical Threshold, Log Discrepancy, Nef Divisor, Quasiprojective VarietyExplore with Wolfram|Alpha
References
Birkar, C. "Boundedness of Fano Type Fibrations." Ann. Sci. École Norm. Sup. 57, 787-840, 2024. https://doi.org/10.24033/asens.2582.Cite this as:
Weisstein, Eric W. "Fano Type Contraction." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/FanoTypeContraction.html