Theorem 2sqlem7 15869

Description: Lemma for 2sq . (Contributed by Mario Carneiro, 19-Jun-2015.)

Hypotheses

Ref	Expression
2sq.1	|- S = ran ( w e. ZZ[_i] |-> ( ( abs ` w ) ^ 2 ) )
2sqlem7.2	|- Y = { z | E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) }

Assertion

Ref	Expression
2sqlem7	|- Y C_ ( S i^i NN )

Distinct variable groups:   x, w, y, z   x, S, y, z   x, Y, y

Allowed substitution hints:   S( w)   Y( z, w)

Proof of Theorem 2sqlem7

Step	Hyp	Ref	Expression
1		2sqlem7.2	. 2 |- Y = { z | E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) }
2		simpr 110	. . . . . . 7 |- ( ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> z = ( ( x ^ 2 ) + ( y ^ 2 ) ) )
3	2	reximi 2629	. . . . . 6 |- ( E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> E. y e. ZZ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) )
4	3	reximi 2629	. . . . 5 |- ( E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> E. x e. ZZ E. y e. ZZ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) )
5		2sq.1	. . . . . 6 |- S = ran ( w e. ZZ[_i] |-> ( ( abs ` w ) ^ 2 ) )
6	5	2sqlem2 15863	. . . . 5 |- ( z e. S <-> E. x e. ZZ E. y e. ZZ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) )
7	4, 6	sylibr 134	. . . 4 |- ( E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> z e. S )
8		1ne0 9211	. . . . . . . . . 10 |- 1 =/= 0
9		gcdeq0 12566	. . . . . . . . . . . . 13 |- ( ( x e. ZZ /\ y e. ZZ ) -> ( ( x gcd y ) = 0 <-> ( x = 0 /\ y = 0 ) ) )
10	9	adantr 276	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x gcd y ) = 0 <-> ( x = 0 /\ y = 0 ) ) )
11		simpr 110	. . . . . . . . . . . . 13 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( x gcd y ) = 1 )
12	11	eqeq1d 2240	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x gcd y ) = 0 <-> 1 = 0 ) )
13	10, 12	bitr3d 190	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x = 0 /\ y = 0 ) <-> 1 = 0 ) )
14	13	necon3bbid 2442	. . . . . . . . . 10 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( -. ( x = 0 /\ y = 0 ) <-> 1 =/= 0 ) )
15	8, 14	mpbiri 168	. . . . . . . . 9 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> -. ( x = 0 /\ y = 0 ) )
16		zsqcl2 10880	. . . . . . . . . . . . 13 |- ( x e. ZZ -> ( x ^ 2 ) e. NN0 )
17	16	ad2antrr 488	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( x ^ 2 ) e. NN0 )
18	17	nn0red 9456	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( x ^ 2 ) e. RR )
19	17	nn0ge0d 9458	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> 0 <_ ( x ^ 2 ) )
20		zsqcl2 10880	. . . . . . . . . . . . 13 |- ( y e. ZZ -> ( y ^ 2 ) e. NN0 )
21	20	ad2antlr 489	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( y ^ 2 ) e. NN0 )
22	21	nn0red 9456	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( y ^ 2 ) e. RR )
23	21	nn0ge0d 9458	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> 0 <_ ( y ^ 2 ) )
24		add20 8654	. . . . . . . . . . 11 |- ( ( ( ( x ^ 2 ) e. RR /\ 0 <_ ( x ^ 2 ) ) /\ ( ( y ^ 2 ) e. RR /\ 0 <_ ( y ^ 2 ) ) ) -> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 <-> ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) ) )
25	18, 19, 22, 23, 24	syl22anc 1274	. . . . . . . . . 10 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 <-> ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) ) )
26		zcn 9484	. . . . . . . . . . . 12 |- ( x e. ZZ -> x e. CC )
27	26	ad2antrr 488	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> x e. CC )
28		zcn 9484	. . . . . . . . . . . 12 |- ( y e. ZZ -> y e. CC )
29	28	ad2antlr 489	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> y e. CC )
30		sqeq0 10865	. . . . . . . . . . . 12 |- ( x e. CC -> ( ( x ^ 2 ) = 0 <-> x = 0 ) )
31		sqeq0 10865	. . . . . . . . . . . 12 |- ( y e. CC -> ( ( y ^ 2 ) = 0 <-> y = 0 ) )
32	30, 31	bi2anan9 610	. . . . . . . . . . 11 |- ( ( x e. CC /\ y e. CC ) -> ( ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) <-> ( x = 0 /\ y = 0 ) ) )
33	27, 29, 32	syl2anc 411	. . . . . . . . . 10 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) <-> ( x = 0 /\ y = 0 ) ) )
34	25, 33	bitrd 188	. . . . . . . . 9 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 <-> ( x = 0 /\ y = 0 ) ) )
35	15, 34	mtbird 679	. . . . . . . 8 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> -. ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 )
36		nn0addcl 9437	. . . . . . . . . . 11 |- ( ( ( x ^ 2 ) e. NN0 /\ ( y ^ 2 ) e. NN0 ) -> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN0 )
37	16, 20, 36	syl2an 289	. . . . . . . . . 10 |- ( ( x e. ZZ /\ y e. ZZ ) -> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN0 )
38	37	adantr 276	. . . . . . . . 9 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN0 )
39		elnn0 9404	. . . . . . . . 9 |- ( ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN0 <-> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN \/ ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 ) )
40	38, 39	sylib 122	. . . . . . . 8 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN \/ ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 ) )
41	35, 40	ecased 1385	. . . . . . 7 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN )
42		eleq1 2294	. . . . . . 7 |- ( z = ( ( x ^ 2 ) + ( y ^ 2 ) ) -> ( z e. NN <-> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN ) )
43	41, 42	syl5ibrcom 157	. . . . . 6 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( z = ( ( x ^ 2 ) + ( y ^ 2 ) ) -> z e. NN ) )
44	43	expimpd 363	. . . . 5 |- ( ( x e. ZZ /\ y e. ZZ ) -> ( ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> z e. NN ) )
45	44	rexlimivv 2656	. . . 4 |- ( E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> z e. NN )
46	7, 45	elind 3392	. . 3 |- ( E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) -> z e. ( S i^i NN ) )
47	46	abssi 3302	. 2 |- { z | E. x e. ZZ E. y e. ZZ ( ( x gcd y ) = 1 /\ z = ( ( x ^ 2 ) + ( y ^ 2 ) ) ) } C_ ( S i^i NN )
48	1, 47	eqsstri 3259	1 |- Y C_ ( S i^i NN )

Syntax hints:   -. wn 3   /\ wa 104   <-> wb 105   \/ wo 715   = wceq 1397   e. wcel 2202   {cab 2217   =/= wne 2402   E.wrex 2511   i^i cin 3199   C_ wss 3200   class class class wbr 4088   |-> cmpt 4150   ran crn 4726   ` cfv 5326  (class class class)co 6018   CCcc 8030   RRcr 8031   0cc0 8032   1c1 8033   + caddc 8035   <_ cle 8215   NNcn 9143   2c2 9194   NN0cn0 9402   ZZcz 9479   ^cexp 10801   abscabs 11575   gcd cgcd 12542   ZZ[_i]cgz 12960

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-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4204  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-iinf 4686  ax-cnex 8123  ax-resscn 8124  ax-1cn 8125  ax-1re 8126  ax-icn 8127  ax-addcl 8128  ax-addrcl 8129  ax-mulcl 8130  ax-mulrcl 8131  ax-addcom 8132  ax-mulcom 8133  ax-addass 8134  ax-mulass 8135  ax-distr 8136  ax-i2m1 8137  ax-0lt1 8138  ax-1rid 8139  ax-0id 8140  ax-rnegex 8141  ax-precex 8142  ax-cnre 8143  ax-pre-ltirr 8144  ax-pre-ltwlin 8145  ax-pre-lttrn 8146  ax-pre-apti 8147  ax-pre-ltadd 8148  ax-pre-mulgt0 8149  ax-pre-mulext 8150  ax-arch 8151  ax-caucvg 8152

This theorem depends on definitions:  df-bi 117  df-stab 838  df-dc 842  df-3or 1005  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-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-if 3606  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-id 4390  df-po 4393  df-iso 4394  df-iord 4463  df-on 4465  df-ilim 4466  df-suc 4468  df-iom 4689  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5971  df-ov 6021  df-oprab 6022  df-mpo 6023  df-1st 6303  df-2nd 6304  df-recs 6471  df-frec 6557  df-sup 7183  df-pnf 8216  df-mnf 8217  df-xr 8218  df-ltxr 8219  df-le 8220  df-sub 8352  df-neg 8353  df-reap 8755  df-ap 8762  df-div 8853  df-inn 9144  df-2 9202  df-3 9203  df-4 9204  df-n0 9403  df-z 9480  df-uz 9756  df-q 9854  df-rp 9889  df-fz 10244  df-fzo 10378  df-fl 10531  df-mod 10586  df-seqfrec 10711  df-exp 10802  df-cj 11420  df-re 11421  df-im 11422  df-rsqrt 11576  df-abs 11577  df-dvds 12367  df-gcd 12543  df-gz 12961

This theorem is referenced by:  2sqlem8  15871  2sqlem9  15872