# Can't understand the meaning of some symbols

by shakgoku
Tags: meaning, symbols
 P: 29 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 $$R^d$$ and $$C^\infty$$ http://flic.kr/p/9K8P7p 2. Relevant equations 3. The attempt at a solution
 Sci Advisor HW Helper Thanks P: 26,167 hi shakgoku! Rd is the same as Rn … i assume "d" stands for "dimension" and C∞ is the space of functions which are differentiable "infinitely many" times
 P: 29 Hey tiny-tim! Thank you , now everything in the page makes sense to me! :)

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