Theorem apirr 8879

Description: Apartness is irreflexive. (Contributed by Jim Kingdon, 16-Feb-2020.)

Assertion

Ref	Expression
apirr	|- ( A e. CC -> -. A # A )

Proof of Theorem apirr

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnre 8270	. 2 |- ( A e. CC -> E. x e. RR E. y e. RR A = ( x + ( _i x. y ) ) )
2		reapirr 8851	. . . . . . . . . 10 |- ( x e. RR -> -. x #ℝ x )
3		apreap 8861	. . . . . . . . . . 11 |- ( ( x e. RR /\ x e. RR ) -> ( x # x <-> x #ℝ x ) )
4	3	anidms 397	. . . . . . . . . 10 |- ( x e. RR -> ( x # x <-> x #ℝ x ) )
5	2, 4	mtbird 680	. . . . . . . . 9 |- ( x e. RR -> -. x # x )
6		reapirr 8851	. . . . . . . . . 10 |- ( y e. RR -> -. y #ℝ y )
7		apreap 8861	. . . . . . . . . . 11 |- ( ( y e. RR /\ y e. RR ) -> ( y # y <-> y #ℝ y ) )
8	7	anidms 397	. . . . . . . . . 10 |- ( y e. RR -> ( y # y <-> y #ℝ y ) )
9	6, 8	mtbird 680	. . . . . . . . 9 |- ( y e. RR -> -. y # y )
10	5, 9	anim12i 338	. . . . . . . 8 |- ( ( x e. RR /\ y e. RR ) -> ( -. x # x /\ -. y # y ) )
11		ioran 760	. . . . . . . 8 |- ( -. ( x # x \/ y # y ) <-> ( -. x # x /\ -. y # y ) )
12	10, 11	sylibr 134	. . . . . . 7 |- ( ( x e. RR /\ y e. RR ) -> -. ( x # x \/ y # y ) )
13		apreim 8877	. . . . . . . 8 |- ( ( ( x e. RR /\ y e. RR ) /\ ( x e. RR /\ y e. RR ) ) -> ( ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) <-> ( x # x \/ y # y ) ) )
14	13	anidms 397	. . . . . . 7 |- ( ( x e. RR /\ y e. RR ) -> ( ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) <-> ( x # x \/ y # y ) ) )
15	12, 14	mtbird 680	. . . . . 6 |- ( ( x e. RR /\ y e. RR ) -> -. ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) )
16	15	ad2antlr 489	. . . . 5 |- ( ( ( A e. CC /\ ( x e. RR /\ y e. RR ) ) /\ A = ( x + ( _i x. y ) ) ) -> -. ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) )
17		id 19	. . . . . . . 8 |- ( A = ( x + ( _i x. y ) ) -> A = ( x + ( _i x. y ) ) )
18	17, 17	breq12d 4122	. . . . . . 7 |- ( A = ( x + ( _i x. y ) ) -> ( A # A <-> ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) ) )
19	18	notbid 673	. . . . . 6 |- ( A = ( x + ( _i x. y ) ) -> ( -. A # A <-> -. ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) ) )
20	19	adantl 277	. . . . 5 |- ( ( ( A e. CC /\ ( x e. RR /\ y e. RR ) ) /\ A = ( x + ( _i x. y ) ) ) -> ( -. A # A <-> -. ( x + ( _i x. y ) ) # ( x + ( _i x. y ) ) ) )
21	16, 20	mpbird 167	. . . 4 |- ( ( ( A e. CC /\ ( x e. RR /\ y e. RR ) ) /\ A = ( x + ( _i x. y ) ) ) -> -. A # A )
22	21	ex 115	. . 3 |- ( ( A e. CC /\ ( x e. RR /\ y e. RR ) ) -> ( A = ( x + ( _i x. y ) ) -> -. A # A ) )
23	22	rexlimdvva 2668	. 2 |- ( A e. CC -> ( E. x e. RR E. y e. RR A = ( x + ( _i x. y ) ) -> -. A # A ) )
24	1, 23	mpd 13	1 |- ( A e. CC -> -. A # A )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 716   = wceq 1398   e. wcel 2203   E.wrex 2521   class class class wbr 4109  (class class class)co 6050   CCcc 8125   RRcr 8126   _ici 8129   + caddc 8130   x. cmul 8132   #_ℝ creap 8848   # cap 8855

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-mulrcl 8226  ax-addcom 8227  ax-mulcom 8228  ax-addass 8229  ax-mulass 8230  ax-distr 8231  ax-i2m1 8232  ax-0lt1 8233  ax-1rid 8234  ax-0id 8235  ax-rnegex 8236  ax-precex 8237  ax-cnre 8238  ax-pre-ltirr 8239  ax-pre-lttrn 8241  ax-pre-apti 8242  ax-pre-ltadd 8243  ax-pre-mulgt0 8244

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-br 4110  df-opab 4172  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-iota 5312  df-fun 5354  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-pnf 8310  df-mnf 8311  df-ltxr 8313  df-sub 8446  df-neg 8447  df-reap 8849  df-ap 8856

This theorem is referenced by:  mulap0r  8889  aptap  8924  eirr  12465  dcapnconst  16847