1. The problem statement, all variables and given/known data Hello …….. I have a question about a statement mentioned in the book “Introduction to tensor calculus and continuum mechanics” . it is :- Where the space (Vn) is Riemann space . Is this statement really true ? 2. Relevant equations 3. The attempt at a solution … because - as I know – we can define a Non-Euclidean space (it isn’t flat) by this method , for example , we can do that in general theory of relativity . Please I need help …. Very thanks ……….