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

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

June 16, 2014 Hypersurfaces, 4manifolds, and characteristic classes

April 1, 2014 The free cocompletion I

December 13, 2013 A transcript of my qualifying exam

December 10, 2013 How to invent intuitionistic logic
Recent Comments
Qiaochu Yuan on Young diagrams, qanalogues, a… mlbaker on Young diagrams, qanalogues, a… Avi on The Picard groups Avi on The Picard groups Avi on The Picard groups Blogroll
 Academically Interesting
 Azimuth
 Climbing Mount Bourbaki
 Combinatorics and more
 Concrete Nonsense
 Geometry and the imagination
 Gowers’s Weblog
 John Baez’s Stuff
 Michael Nielsen
 Quomodocumque
 Secret Blogging Seminar
 ShtetlOptimized
 Sketches of Topology
 The nCategory Cafe
 Todd and Vishal’s blog
 Vi Hart – Blog
 What's new
 XOR's Hammer
Categories
Archives
 November 2014
 October 2014
 June 2014
 April 2014
 December 2013
 October 2013
 September 2013
 July 2013
 June 2013
 May 2013
 April 2013
 March 2013
 February 2013
 November 2012
 October 2012
 September 2012
 August 2012
 July 2012
 June 2012
 May 2012
 April 2012
 March 2012
 February 2012
 January 2012
 December 2011
 November 2011
 October 2011
 August 2011
 July 2011
 June 2011
 April 2011
 March 2011
 February 2011
 January 2011
 December 2010
 November 2010
 October 2010
 September 2010
 August 2010
 July 2010
 June 2010
 May 2010
 April 2010
 March 2010
 February 2010
 January 2010
 December 2009
 November 2009
 October 2009
 September 2009
 August 2009
 July 2009
 June 2009
 May 2009
 April 2009
 January 2009
Tag Cloud
2categories 4manifolds abstract nonsense 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