Theorem strndxid 11769

Description: The value of a structure component extractor is the value of the corresponding slot of the structure. (Contributed by AV, 13-Mar-2020.)

Hypotheses

Ref	Expression
strndxid.s	|- ( ph -> S e. V )
strndxid.e	|- E = Slot N
strndxid.n	|- N e. NN

Assertion

Ref	Expression
strndxid	|- ( ph -> ( S ` ( E ` ndx ) ) = ( E ` S ) )

Proof of Theorem strndxid

Step	Hyp	Ref	Expression
1		strndxid.e	. . . 4 |- E = Slot N
2		strndxid.n	. . . 4 |- N e. NN
3	1, 2	ndxid 11765	. . 3 |- E = Slot ( E ` ndx )
4		strndxid.s	. . 3 |- ( ph -> S e. V )
5	1, 2	ndxarg 11764	. . . . 5 |- ( E ` ndx ) = N
6	5, 2	eqeltri 2172	. . . 4 |- ( E ` ndx ) e. NN
7	6	a1i 9	. . 3 |- ( ph -> ( E ` ndx ) e. NN )
8	3, 4, 7	strnfvnd 11761	. 2 |- ( ph -> ( E ` S ) = ( S ` ( E ` ndx ) ) )
9	8	eqcomd 2105	1 |- ( ph -> ( S ` ( E ` ndx ) ) = ( E ` S ) )

Syntax hints:   -> wi 4   = wceq 1299   e. wcel 1448   ` cfv 5059   NNcn 8578   ndxcnx 11738  Slot cslot 11740

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 671  ax-5 1391  ax-7 1392  ax-gen 1393  ax-ie1 1437  ax-ie2 1438  ax-8 1450  ax-10 1451  ax-11 1452  ax-i12 1453  ax-bndl 1454  ax-4 1455  ax-13 1459  ax-14 1460  ax-17 1474  ax-i9 1478  ax-ial 1482  ax-i5r 1483  ax-ext 2082  ax-sep 3986  ax-pow 4038  ax-pr 4069  ax-un 4293  ax-cnex 7586  ax-resscn 7587  ax-1re 7589  ax-addrcl 7592

This theorem depends on definitions:  df-bi 116  df-3an 932  df-tru 1302  df-nf 1405  df-sb 1704  df-eu 1963  df-mo 1964  df-clab 2087  df-cleq 2093  df-clel 2096  df-nfc 2229  df-ral 2380  df-rex 2381  df-v 2643  df-sbc 2863  df-un 3025  df-in 3027  df-ss 3034  df-pw 3459  df-sn 3480  df-pr 3481  df-op 3483  df-uni 3684  df-int 3719  df-br 3876  df-opab 3930  df-mpt 3931  df-id 4153  df-xp 4483  df-rel 4484  df-cnv 4485  df-co 4486  df-dm 4487  df-rn 4488  df-res 4489  df-iota 5024  df-fun 5061  df-fv 5067  df-inn 8579  df-ndx 11744  df-slot 11745

This theorem is referenced by: (None)