The Lawrence-Sullivan construction is the right model of $I^+$
  We prove that the universal enveloping algebra of the Lawrence-Sullivan construction is a particular perturbation of the complete Baues-Lemaire cylinder of $S^0$. Together with other evidences we present, this exhibits the Lawrence-Sullivan construction as the right model of $I^+$. From this, we also deduce a generalized Euler formula on Bernoulli numbers. 
Urtzi Buijs and Aniceto Murillo
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