Theorem irrapxlem6 37391

Description: Lemma for irrapx1 37392. Explicit description of a non-closed set. (Contributed by Stefan O'Rear, 13-Sep-2014.)

Assertion

Ref	Expression
irrapxlem6	|- ( ( A e. RR+ /\ B e. RR+ ) -> E. x e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } ( abs ` ( x - A ) ) < B )

Distinct variable groups:   x, A, y   x, B, y

Proof of Theorem irrapxlem6

Dummy variable a is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simplr 792	. . . 4 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> a e. QQ )
2		simpr1 1067	. . . . 5 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> 0 < a )
3		simpr3 1069	. . . . 5 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) )
4	2, 3	jca 554	. . . 4 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> ( 0 < a /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) )
5		breq2 4657	. . . . . 6 |- ( y = a -> ( 0 < y <-> 0 < a ) )
6		oveq1 6657	. . . . . . . 8 |- ( y = a -> ( y - A ) = ( a - A ) )
7	6	fveq2d 6195	. . . . . . 7 |- ( y = a -> ( abs ` ( y - A ) ) = ( abs ` ( a - A ) ) )
8		fveq2 6191	. . . . . . . 8 |- ( y = a -> (denom ` y ) = (denom ` a ) )
9	8	oveq1d 6665	. . . . . . 7 |- ( y = a -> ( (denom ` y ) ^ -u 2 ) = ( (denom ` a ) ^ -u 2 ) )
10	7, 9	breq12d 4666	. . . . . 6 |- ( y = a -> ( ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) <-> ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) )
11	5, 10	anbi12d 747	. . . . 5 |- ( y = a -> ( ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) <-> ( 0 < a /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) )
12	11	elrab 3363	. . . 4 |- ( a e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } <-> ( a e. QQ /\ ( 0 < a /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) )
13	1, 4, 12	sylanbrc 698	. . 3 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> a e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } )
14		simpr2 1068	. . 3 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> ( abs ` ( a - A ) ) < B )
15		oveq1 6657	. . . . . 6 |- ( x = a -> ( x - A ) = ( a - A ) )
16	15	fveq2d 6195	. . . . 5 |- ( x = a -> ( abs ` ( x - A ) ) = ( abs ` ( a - A ) ) )
17	16	breq1d 4663	. . . 4 |- ( x = a -> ( ( abs ` ( x - A ) ) < B <-> ( abs ` ( a - A ) ) < B ) )
18	17	rspcev 3309	. . 3 |- ( ( a e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } /\ ( abs ` ( a - A ) ) < B ) -> E. x e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } ( abs ` ( x - A ) ) < B )
19	13, 14, 18	syl2anc 693	. 2 |- ( ( ( ( A e. RR+ /\ B e. RR+ ) /\ a e. QQ ) /\ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) ) -> E. x e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } ( abs ` ( x - A ) ) < B )
20		irrapxlem5 37390	. 2 |- ( ( A e. RR+ /\ B e. RR+ ) -> E. a e. QQ ( 0 < a /\ ( abs ` ( a - A ) ) < B /\ ( abs ` ( a - A ) ) < ( (denom ` a ) ^ -u 2 ) ) )
21	19, 20	r19.29a 3078	1 |- ( ( A e. RR+ /\ B e. RR+ ) -> E. x e. { y e. QQ | ( 0 < y /\ ( abs ` ( y - A ) ) < ( (denom ` y ) ^ -u 2 ) ) } ( abs ` ( x - A ) ) < B )

Syntax hints:   -> wi 4   /\ wa 384   /\ w3a 1037   e. wcel 1990   E.wrex 2913   {crab 2916   class class class wbr 4653   ` cfv 5888  (class class class)co 6650   0cc0 9936   < clt 10074   - cmin 10266   -ucneg 10267   2c2 11070   QQcq 11788   RR+crp 11832   ^cexp 12860   abscabs 13974  denomcdenom 15442

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-pre-sup 10014

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-sup 8348  df-inf 8349  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-xnn0 11364  df-z 11378  df-uz 11688  df-q 11789  df-rp 11833  df-ico 12181  df-fz 12327  df-fl 12593  df-mod 12669  df-seq 12802  df-exp 12861  df-hash 13118  df-cj 13839  df-re 13840  df-im 13841  df-sqrt 13975  df-abs 13976  df-dvds 14984  df-gcd 15217  df-numer 15443  df-denom 15444

This theorem is referenced by:  irrapx1  37392