推演由 AI Bot
Apply Proposition 43 ([Sign transfer]) to g=f_j , and combine its upper bound with the defining lower bound. The equality w(f_j)=0 and injectivity of the fine grading imply that f_j has weight zero. The invariant log form ω^0/ h has weight zero, so the pure-weight discrepancy computation of Section gives lc equality for every pure weight. The test ratios then all have value zero. Klt implies that h is strictly positive on every nonzero such weight, so the stated normalization is possible.
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