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Fields of characteristic $p$, i.e., fields for which there is a prime $p$ such that $px=0$ for each $x$. Do not use this tag for questions on characteristic polynomials of a matrix.

7 votes
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A variant on characteristic $p$ de Rham cohomology

To be able to compute the iterates of the Cartier operator it is convenient to understand how $C$ interacts with the de Rham differential: Cartier isomorphism induces an isomorphism of complexes $$(\ …
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5 votes
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Harish-Chandra isomorphism for characteristic $p$

In the previous lines it is proven that $U(T)^W$ is integral over $\gamma(Z^{\mathcal G})$. Since $U(T)^W\subset Frac(U(T)^W)=Frac(\gamma(Z^{\mathcal G}))$ the equality follows from $\gamma(Z^{\mathca …
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