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	|- RR^ = ( i e. _V |-> ( toCPreHil ` ( RRfld freeLMod i ) ) )

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		crrx	|- RR^
1		vi	|- i
2		cvv	|- _V
3		ctcph	|- toCPreHil
4		crefld	|- RRfld
5		cfrlm	|- freeLMod
6	1	cv	|- i
7	4 6 5	co	|- ( RRfld freeLMod i )
8	7 3	cfv	|- ( toCPreHil ` ( RRfld freeLMod i ) )
9	1 2 8	cmpt	|- ( i e. _V |-> ( toCPreHil ` ( RRfld freeLMod i ) ) )
10	0 9	wceq	|- RR^ = ( i e. _V |-> ( toCPreHil ` ( RRfld freeLMod i ) ) )