Theorem negm 9848

Description: The image under negation of an inhabited set of reals is inhabited. (Contributed by Jim Kingdon, 10-Apr-2020.)

Assertion

Ref	Expression
negm	|- ( ( A C_ RR /\ E. x x e. A ) -> E. y y e. { z e. RR | -u z e. A } )

Distinct variable group:   x, A, y, z

Proof of Theorem negm

Step	Hyp	Ref	Expression
1		ssel 3221	. . . . 5 |- ( A C_ RR -> ( x e. A -> x e. RR ) )
2		renegcl 8439	. . . . . . . 8 |- ( x e. RR -> -u x e. RR )
3		negeq 8371	. . . . . . . . . 10 |- ( z = -u x -> -u z = -u -u x )
4	3	eleq1d 2300	. . . . . . . . 9 |- ( z = -u x -> ( -u z e. A <-> -u -u x e. A ) )
5	4	elrab3 2963	. . . . . . . 8 |- ( -u x e. RR -> ( -u x e. { z e. RR | -u z e. A } <-> -u -u x e. A ) )
6	2, 5	syl 14	. . . . . . 7 |- ( x e. RR -> ( -u x e. { z e. RR | -u z e. A } <-> -u -u x e. A ) )
7		recn 8164	. . . . . . . . 9 |- ( x e. RR -> x e. CC )
8	7	negnegd 8480	. . . . . . . 8 |- ( x e. RR -> -u -u x = x )
9	8	eleq1d 2300	. . . . . . 7 |- ( x e. RR -> ( -u -u x e. A <-> x e. A ) )
10	6, 9	bitrd 188	. . . . . 6 |- ( x e. RR -> ( -u x e. { z e. RR | -u z e. A } <-> x e. A ) )
11	10	biimprd 158	. . . . 5 |- ( x e. RR -> ( x e. A -> -u x e. { z e. RR | -u z e. A } ) )
12	1, 11	syli 37	. . . 4 |- ( A C_ RR -> ( x e. A -> -u x e. { z e. RR | -u z e. A } ) )
13		elex2 2819	. . . 4 |- ( -u x e. { z e. RR | -u z e. A } -> E. y y e. { z e. RR | -u z e. A } )
14	12, 13	syl6 33	. . 3 |- ( A C_ RR -> ( x e. A -> E. y y e. { z e. RR | -u z e. A } ) )
15	14	exlimdv 1867	. 2 |- ( A C_ RR -> ( E. x x e. A -> E. y y e. { z e. RR | -u z e. A } ) )
16	15	imp 124	1 |- ( ( A C_ RR /\ E. x x e. A ) -> E. y y e. { z e. RR | -u z e. A } )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1397   E.wex 1540   e. wcel 2202   {crab 2514   C_ wss 3200   RRcr 8030   -ucneg 8350

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-setind 4635  ax-resscn 8123  ax-1cn 8124  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-distr 8135  ax-i2m1 8136  ax-0id 8139  ax-rnegex 8140  ax-cnre 8142

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-sub 8351  df-neg 8352

This theorem is referenced by: (None)