> The basic idea is to have an expressive programming language where all constructs are differentiable. Since the composition of diffeomorphisms is a diffeomorphism, (...)
No. It has nothing to do with diffeomorphisms (which are necessarily between spaces of the same dimension), but with piecewise differentiable functions.
No. It has nothing to do with diffeomorphisms (which are necessarily between spaces of the same dimension), but with piecewise differentiable functions.