Metamath Proof Explorer


Definition df-rrx

Description: Define the function associating with a set the free real vector space on that set, equipped with the natural inner product and norm. This is the direct sum of copies of the field of real numbers indexed by that set. We call it here a "generalized real Euclidean space", but note that it need not be complete (for instance if the given set is infinite countable). (Contributed by Thierry Arnoux, 16-Jun-2019)

Ref Expression
Assertion df-rrx ℝ↑ = i V toCPreHil fld freeLMod i

Detailed syntax breakdown

Step Hyp Ref Expression
0 crrx class ℝ↑
1 vi setvar i
2 cvv class V
3 ctcph class toCPreHil
4 crefld class fld
5 cfrlm class freeLMod
6 1 cv setvar i
7 4 6 5 co class fld freeLMod i
8 7 3 cfv class toCPreHil fld freeLMod i
9 1 2 8 cmpt class i V toCPreHil fld freeLMod i
10 0 9 wceq wff ℝ↑ = i V toCPreHil fld freeLMod i