Metamath Proof Explorer


Theorem ipsip

Description: The multiplicative operation of a constructed inner product space. (Contributed by Stefan O'Rear, 27-Nov-2014) (Revised by Mario Carneiro, 29-Aug-2015) (Revised by Thierry Arnoux, 16-Jun-2019)

Ref Expression
Hypothesis ipspart.a
|- A = ( { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. , <. ( .r ` ndx ) , .X. >. } u. { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. } )
Assertion ipsip
|- ( I e. V -> I = ( .i ` A ) )

Proof

Step Hyp Ref Expression
1 ipspart.a
 |-  A = ( { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. , <. ( .r ` ndx ) , .X. >. } u. { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. } )
2 1 ipsstr
 |-  A Struct <. 1 , 8 >.
3 ipid
 |-  .i = Slot ( .i ` ndx )
4 snsstp3
 |-  { <. ( .i ` ndx ) , I >. } C_ { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. }
5 ssun2
 |-  { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. } C_ ( { <. ( Base ` ndx ) , B >. , <. ( +g ` ndx ) , .+ >. , <. ( .r ` ndx ) , .X. >. } u. { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. } )
6 5 1 sseqtrri
 |-  { <. ( Scalar ` ndx ) , S >. , <. ( .s ` ndx ) , .x. >. , <. ( .i ` ndx ) , I >. } C_ A
7 4 6 sstri
 |-  { <. ( .i ` ndx ) , I >. } C_ A
8 2 3 7 strfv
 |-  ( I e. V -> I = ( .i ` A ) )