What differences are between $\mathbb{E}^n$ and $\mathbb{R}^n$ What differences are between the two notations $\mathbb{E}^n$ and $\mathbb{R}^n$?
Do they represent/define the same  space set with the same structure(s)?
Thanks and regards!

I am not sure if this is standard notation, but if an author distinguishes between $\mathbb{R}^n$ and $\mathbb{E}^n$, the former may refer to the real $n$-vector space, whereas the latter also include the structure of an inner product space.
The Wikipedia article seems to agree with this.
