Ningchuan Zhang

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20242026

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math.AT2026

Picard groups of quotient ring spectra

Ishan Levy, Guchuan Li, Ningchuan Zhang

We develop tools to study Picard groups of quotients of ring spectra by a finitely generated ideal, which we use to show that $Pic (E_{n} / I) = Z /2$ , where $…

math.AT2025

The inverse limit topology and profinite descent on Picard groups in $K (n)$ -local homotopy theory

Guchuan Li, Ningchuan Zhang

In this paper, we study profinite descent theory for Picard groups in $K (n)$ -local homotopy theory through their inverse limit topology. Building upon Burklund's result on the mult…

Picard groups of quotient ring spectra

The inverse limit topology and profinite descent on Picard groups in K(n)-local homotopy theory

The inverse limit topology and profinite descent on Picard groups in $K (n)$ -local homotopy theory