1. The problem statement, all variables and given/known data This is an extract from elements of mechanics by giovanni. I'[m unable to understand the meaning of [tex]R^d[/tex] and [tex]C^\infty[/tex] http://flic.kr/p/9K8P7p 2. Relevant equations 3. The attempt at a solution
hi shakgoku! R^{d} is the same as R^{n} … i assume "d" stands for "dimension" and C^{∞} is the space of functions which are differentiable "infinitely many" times