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Purity in chromatically localized algebraic 𝐾-theory
Journal of the American Mathematical Society ( IF 3.5 ) Pub Date : 2024-02-01 , DOI: 10.1090/jams/1043
Markus Land , Akhil Mathew , Lennart Meier , Georg Tamme

We prove a purity property in telescopically localized algebraic K K -theory of ring spectra: For n 1 n\geq 1 , the T ( n ) T(n) -localization of K ( R ) K(R) only depends on the T ( 0 ) T ( n ) T(0)\oplus \dots \oplus T(n) -localization of R R . This complements a classical result of Waldhausen in rational K K -theory. Combining our result with work of Clausen–Mathew–Naumann–Noel, one finds that L T ( n ) K ( R ) L_{T(n)}K(R) in fact only depends on the T ( n 1 ) T ( n ) T(n-1)\oplus T(n) -localization of R R , again for n 1 n \geq 1 . As consequences, we deduce several vanishing results for telescopically localized K K -theory, as well as an equivalence between K ( R ) K(R) and T C ( τ 0 R ) TC(\tau _{\geq 0} R) after T ( n ) T(n) -localization for n 2 n\geq 2 .



中文翻译:


半色局部域代数 K 理论中的纯度



我们在望远镜定位代数 K -环谱理论中证明了纯度特性: 对于 n ≥ 1 n\geq 1 , K ( R ) K(R) 的 T ( n ) T(n) -定位仅取决于 T ( 0 ) ⊕ ⋯ ⊕ T ( n ) T(0)\oplus \dots \oplus T(n) -R 的定位。这补充了 Waldhausen 在有理 K K 理论中的经典结果。将我们的结果与 Clausen-Mathew-Naumann-Noel 的工作相结合,发现 L T ( n ) K ( R ) L_{T(n)}K(R) 实际上只取决于 T ( n − 1 ) ⊕ T ( n ) T(n-1)\oplus T(n) -R 的定位,同样对于 n ≥ 1 n \geq 1 。因此,我们推导出了望远镜定位 K K 理论的几个消失结果,以及 T ( n ) T(n) 定位后 K ( r ) K(R) 和 T C ( τ ≥ 0 R ) TC(\tau _{\geq 0} R) 之间的等效性 n ≥ 2 n\geq 2 .

更新日期:2024-02-01
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