Note on perfectoid spaces
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An introduction to anti-homomorphisms of groups
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代数几何简介
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Mathematical analysis notes
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What is base change map $U\times_{X}X\rightarrow U\times_{Y}Y$?
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Proof of the isomorphism $\textrm{Hom}_{A-mod}(\textrm{Hom}_{A-mod}(A,A),A)\cong A$ for any ring $A$
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Notes on talk 1. anabelian geometry: introduction
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Anti-homomorphism in Rings
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