pdf online search and view
Related

y ) {\displaystyle K_{o}(x,y)=\sum _{\gamma \in o}f(x^{-1}\gamma y)=\sum _{\delta \in \Gamma _{\gamma }\backslash \Gamma }f(x^{-1}\delta

formula is the solution to the equation Z = log(eX eY) for possibly noncommutative X and Y in the Lie algebra of a Lie group. This formula tightly