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Peter Tingley

  1. A minus sign that used to annoy me but now I know why it is there
    2010/02/02 by Peter Tingley, Tingley, Peter · 1 voice · 1 citation
    Mathematics · #Algebraic structures and combinatorial models #Geometric and Algebraic Topology #Homotopy and Cohomology in Algebraic Topology #math.GT #math.QA