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注:标题略做修订.
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Step1.
1. ACC for lc thresholds.
2. eps'∈(0, eps). eps'=eps'(d).
3. (Y, (1 - eps')S) is Q-factorial klt.
(S is reduced).
4. (Y, S) is lc.
5. Cutting by |A|.(?)
6. Th1.6 (≤ d - 1).
7. (X, U + 2vU) klt o.c.
8. (X, U + vU) eps'/2-lc o.c.
9. (X, U) eps'-lc.
注: 1 ==> 2; 3==> 4; 5,6 =?=> 7, 9 ==> 8.
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点评: 1~4 源于[11], 2014年的文章.
---- 可见, 做研究肯定得了解阅读有关文章.
---- (1 - eps')S 是新式的“相”, 肯定值得注意.
(全篇的主要技巧在于“造相”).
---- 1~4 仅为 5~9 提供 eps'.
---- 1~4 在命题5.9证明中的用处待考(?).
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评论: Step1的落点是 (X, U + vU) eps'/2-lc.
---- U + vU 形式源于 lc threshold.(cf.Th1.6).
---- 结合 eps'/2-lc, 预示 “锻法造相”.
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图解: (X, U + vU) eps'/2-lc ~> 锻法.
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感悟: 若数学是一环套一环, 则应密切注意各环的 “上下家” (context), 以期提高预见能力.
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小结: Step1 分为两个模块, 前者提供eps', 后者为锻法做准备. 锻法的征兆是 U + vU 或 B + tB 这种形式.
符号大全、上下标.|| 常用:↑↓ π ΓΔΛΘΩμφΣ∈ ∉ ∪ ∩ ⊆ ⊇ ⊂ ⊃ ≤ ≥ ⌊ ⌋ ⌈ ⌉ ≠ ≡ ⁻⁰ ¹ ² ³ ᵈ ₀ ₁ ₂ ₃ ᵢ .
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第一轮读写链接(按目录顺序)
Abstract 8/4
Introduction
Boundedness of singular Fano varieties (1) 8/5
Boundedness of singular Fano varieties (2) 8/6
Boundedness of singular Fano varieties (3) 8/7
Boundedness of singular Fano varieties (4) 8/8
Boundedness of singular Fano varieties (5) 8/9
Boundedness of singular Fano varieties (6) 8/9
Jordan property of Cremona groups 8/10
Lc thresholds of lR-linear systems 8/11
Lc thresholds of anti-log canonical systems of Fano pairs (1) 8/12
Lc thresholds of anti-log canonical systems of Fano pairs (2) 8/13
Lc thresholds of R-linear systems with bounded degree 8/14
Complements near a divisor 8/15
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Proposition 5.211/9
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Proposition 5.5 11/5
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