260a14acce2a89dad36adc8eefe7c59e-Supplemental-Conference.pdf

In the following subsections, we will show that such formulation decouples the modelϵθ from the specific noise schedule, and thus isinvariant tothe noise schedule. Finally,welisttheclosed-formsofφk fork = 1,2,3: φ1(h)= eh 1 h , (B.5) φ2(h)= eh h 1 h2 Note that the above update is the same as a single step of DPM-Solver-2 withs = ti 1 and t = ti, except that xti 1 is replaced with the exact solutionxti 1.