We split the residual of the space–time reconstruction into hyperbolic and parabolic contributions and treat them in different norms.
将残差分裂为「双曲部分」和「抛物部分」并用不同范数处理——这个技巧看似平凡，实则是整篇论文最关键的工程决策。若不分裂，估计器会包含 ε⁻¹ 量级的项，在对流主导时完全失效。这类「范数分裂」策略在偏微分方程分析中是一种深刻的技巧：问题的物理本质（双曲 vs 抛物）决定了应该在哪个函数空间中度量误差。
I've encountered several people in the Kagyu and Nyingma traditions who say, "Oh, we, you know 'tukdam,' yeah, people go in 'tukdam,' "but it's like, you know, not that big a deal. It's, we don't care that much." Part of the reason they don't care that much is that the idea that you need to go into this completely, kind of, a state where there's no phenomenal content— that's just a pure clear light mind— actually is something that many of the contemporary practitioners and teachers in those lineages don't agree with.
for - Buddhism - Tibetan - Kagyu and Nyingma schools don't make a big deal out of Tukdam - nondual awareness can emerge with other techniques - key insight - Buddhism - Tibetan - Clear light meditation at time of death - Tukdam - a physiological technique - from Youtube - Between Life and Death: Understanding Tukdam - John D. Dunne
it's said that you can get there by doing like philosophical analysis, but this is using basically physiological techniques to get to the same place phenomenologically. So that's what "tukdam" is theoretically
for - key insight - Buddhism - Tibetan - Clear light meditation at time of death - Tukdam - a physiological technique to get to the same place as philosophical analysis - recognizing nondual, ultimate nature of reality - from Youtube - Between Life and Death: Understanding Tukdam - John D. Dunne