Addendum to “Termination of 4-fold Canonical Flips”
Addendum to “Termination of 4-fold Canonical Flips”
There are errors in the definition of the weighted version of ‘difficulty’ in “Termination of 4-fold canonical flips”. In this paper, we describe these errors and correct them. After these corrections, Theorem 5.2 holds: every sequence of 4-fold canonical flips terminates.