• G2 and the rolling ball 

      Huerta, John (2017-05-09)
      Understanding the exceptional Lie groups as the symmetry groups of simpler objects is a long-standing program in mathematics. Here, we explore one famous realization of the smallest exceptional Lie group, G2: Its Lie ...
    • L-InfinityAlgebras, Cohomology and M-Theory 

      Huerta, John (2017-05-12)
      In this introduction for topologists, we explain the role that extensions of L-infinity algebras by taking homotopy fibers plays in physics. This first appeared with the work of physicists D'Auria and Fre in 1982, ...