Non-quasi- F -split canonical affine fourfolds exist in every characteristic

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. 1Quasi‐F‐splittings in birational geometry II2024 · 3 citations
2. 2On Gorenstein $\mathbb{Q}_p$-rational threefolds and fourfolds2025
3. 3Constructing prime $\mathbb{Q}$-Fano threefolds of codimension four via key varieties related with $\mathbb{P}^2\times \mathbb{P}^2$-fibrations2024
4. 4Vanishing theorems for Fano threefolds in positive characteristic2024 · 1 citations
5. 5Boundedness of weak Fano threefolds with fixed Gorenstein index in positive characteristic2024