About: Qiaochu Yuan
 Website
 http://math.berkeley.edu/~qchu/
 Details
Posts by Qiaochu Yuan:

May 17, 2015 Generators

May 7, 2015 Tiny objects

April 25, 2015 Compact objects

March 28, 2015 Projective objects

November 29, 2014 Topological Diophantine equations

October 19, 2014 The Picard groups

October 14, 2014 Five proofs that the Euler characteristic of a closed orientable surface is even
Recent Comments
Qiaochu Yuan on The Picard groups marco on The Picard groups Qiaochu Yuan on The connected components … A on The connected components … Ronnie Brown on Groupoids Blogroll
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Tag Cloud
2categories 4manifolds adjoint functors asymptotics Catalan numbers characteristic classes cobordism cohomology Coxeter groups deformation quantization determinants diagrammatic algebra Dynkin diagrams elliptic curves enriched categories estimation Euler characteristic finite fields fixed point theorems Fourier transforms Frobenius map genera generating functions group actions groupoids Hecke algebras Lawvere theories MaBloWriMo MathOverflow modular forms moments monoidal categories Nullstellensatz partition functions pedagogy philosophy of mathematics Poincare duality profinite groups qanalogues quantum groups quaternions representation theory of the symmetric group selfreference species theory symmetric functions ultrafilters universal properties walks on graphs Yoneda lemma Young tableaux zeta functions