absolute complexity

Definition 1.7 Let X be a proper variety of dimension n, and let .X; / be a log pair. The absolute complexity D .X; / of .X; / is n C d , where is the rank of the group of Weil divisors modulo algebraic equivalence and d is the sum of the coefficients of . If X is Q-factorial, then is the Picard number. (paper) (Brown et al., 2018, p. 925)