Subject: query
From: jim stasheff <jds@math.upenn.edu>
Date: Thu, 06 Sep 2007 17:28:23 -0400

KT Chen invented his theory of smooth spaces via plots
in part to do `differential geometry' on a loop space. His collected
works would contain a lot of the pieces of such a geometry
but I think other applications he did not get to before his early death.

Is there anything like a textbook or ``Differential Geometry from Chen's 
point of view'?