Florian Riedel

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math.AT2025

Reduced points of $E_{\infty}$ -rings in positive characteristic

Florian Riedel

We investigate whether an arbitrary non-zero $E_{\infty}$ -ring $A$ admits a reduced point, meaning an $E_{\infty}$ -map $A \to T$ such that $π_{*} T$ is a graded fiel…

math.AT2023

On the deformation theory of $E_{\infty}$ -coalgebras

Florian Riedel

We introduce a notion of formally étale $E_{\infty}$ -coalgebras and show that they admit essentially unique, functorial lifts along square zero extensions of $\mathbb{E}_{…

Reduced points of E∞​-rings in positive characteristic

On the deformation theory of E∞​-coalgebras

Reduced points of $E_{\infty}$ -rings in positive characteristic

On the deformation theory of $E_{\infty}$ -coalgebras