What is the most general manifoldCan one construct for whichall/any compact Surfaces in $\mathbb{R}^3$ a Schwartz space space like object is defined andin a way so that the space can be given a structure analogous to the convolution algebra structure it is typically equipped in vector spaces (over $\mathbb{R}$ and $\mathbb{C}$)? Are there more examples than uni-modular Lie groups where the convolution theorem holds?
Compact SurfacesDoes anything analogous to the convolution theorem hold in $\mathbb{R}^3$ are cases of most interest.such a setting?