Shai Keidar

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20192026

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math.AT2025

Semiadditive Alternating Powers and Twisted Power Operation

Shai Keidar, Shaul Ragimov

We study a class of representations of symmetric groups in higher semiadditive categories. For these representations in $Mod_{E_{n}}^{\land}$ , the transchromatic character…

math.AT2025

Twisted Graded Categories

Shai Keidar, Shaul Ragimov

Given a presentably symmetric monoidal $\infty$ -category $C$ and an $E_{\infty}$ -monoid $M$ , we introduce and classify twisted graded categories, which generaliz…

math.AT2024

On The Telescopic Picard Group

Shai Keidar

We prove that for any prime $p$ and height $n \geq 1$ , the telescopic Picard group $Pic (Sp_{T n})$ contains a subgroup of the form $\mathbb{Z}_p \times \mathbb{Z}/a…