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papers
Publications (3)
math.QA
2010
Hall Algebras as Hopf Objects
Christopher D. Walker
math.QA
2008
Groupoidification Made Easy
John C. Baez, Alexander E. Hoffnung, Christopher D. Walker
math.QA
2010
Higher-Dimensional Algebra VII: Groupoidification
John C. Baez, Alexander E. Hoffnung, Christopher D. Walker