Expositions - Yunhai Xiang

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March 2026

Formalization of a Result of Fibonacci Sequence March 8, 2026
AI for Math March 2, 2026

February 2026

Leray and Serre–Hochschild Spectral Sequences February 2, 2026

January 2026

Expander Graphs January 24, 2026
Brauer Groups Part II January 18, 2026

December 2025

Brauer Groups Part I December 19, 2025
Fppf Site, Faithfully Flat Descent, and Fibred Categories December 11, 2025
Triangulated Categories December 10, 2025
Derived Category December 9, 2025
Abelian Categories and Derived Functors December 8, 2025
What is This Thing Called Knowledge? December 7, 2025
Grothendieck-Witt Ring December 6, 2025