def D
import bend-collections-laws-math@1.0.0.0/proofs/math/typed/f64close.bend as F64closeimport Base
import bend-collections-laws-math@1.0.0.0/spec/math/f64.bend as SF
import bend-collections-laws-math@1.0.0.0/src/math/f64.bend as F
19def D(+a: F.F64, +b: F.F64) -> F.F64:
20 SF.fabs(SF.add(b, SF.neg(a)))