Theorem 2sqlem7 16154

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 2647	. . . . . 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 2647	. . . . 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 16148	. . . . 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 9351	. . . . . . . . . 10 |- 1 =/= 0
9		gcdeq0 12732	. . . . . . . . . . . . 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 2247	. . . . . . . . . . . 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 2460	. . . . . . . . . 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 11032	. . . . . . . . . . . . 13 |- ( x e. ZZ -> ( x ^ 2 ) e. NN0 )
17	16	ad2antrr 492	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( x ^ 2 ) e. NN0 )
18	17	nn0red 9600	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( x ^ 2 ) e. RR )
19	17	nn0ge0d 9602	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> 0 <_ ( x ^ 2 ) )
20		zsqcl2 11032	. . . . . . . . . . . . 13 |- ( y e. ZZ -> ( y ^ 2 ) e. NN0 )
21	20	ad2antlr 493	. . . . . . . . . . . 12 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( y ^ 2 ) e. NN0 )
22	21	nn0red 9600	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( y ^ 2 ) e. RR )
23	21	nn0ge0d 9602	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> 0 <_ ( y ^ 2 ) )
24		add20 8792	. . . . . . . . . . 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 1279	. . . . . . . . . 10 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 <-> ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) ) )
26		zcn 9628	. . . . . . . . . . . 12 |- ( x e. ZZ -> x e. CC )
27	26	ad2antrr 492	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> x e. CC )
28		zcn 9628	. . . . . . . . . . . 12 |- ( y e. ZZ -> y e. CC )
29	28	ad2antlr 493	. . . . . . . . . . 11 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> y e. CC )
30		sqeq0 11017	. . . . . . . . . . . 12 |- ( x e. CC -> ( ( x ^ 2 ) = 0 <-> x = 0 ) )
31		sqeq0 11017	. . . . . . . . . . . 12 |- ( y e. CC -> ( ( y ^ 2 ) = 0 <-> y = 0 ) )
32	30, 31	bi2anan9 614	. . . . . . . . . . 11 |- ( ( x e. CC /\ y e. CC ) -> ( ( ( x ^ 2 ) = 0 /\ ( y ^ 2 ) = 0 ) <-> ( x = 0 /\ y = 0 ) ) )
33	27, 29, 32	syl2anc 415	. . . . . . . . . 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 684	. . . . . . . 8 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> -. ( ( x ^ 2 ) + ( y ^ 2 ) ) = 0 )
36		nn0addcl 9577	. . . . . . . . . . 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 9544	. . . . . . . . 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 1390	. . . . . . 7 |- ( ( ( x e. ZZ /\ y e. ZZ ) /\ ( x gcd y ) = 1 ) -> ( ( x ^ 2 ) + ( y ^ 2 ) ) e. NN )
42		eleq1 2301	. . . . . . 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 2674	. . . 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 3414	. . 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 3323	. 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 3280	1 |- Y C_ ( S i^i NN )

Syntax hints:   -. wn 3   /\ wa 104   <-> wb 105   \/ wo 720   = wceq 1402   e. wcel 2209   {cab 2224   =/= wne 2420   E.wrex 2529   i^i cin 3219   C_ wss 3220   class class class wbr 4125   |-> cmpt 4187   ran crn 4770   ` cfv 5372  (class class class)co 6075   CCcc 8167   RRcr 8168   0cc0 8169   1c1 8170   + caddc 8172   <_ cle 8351   NNcn 9283   2c2 9334   NN0cn0 9542   ZZcz 9623   ^cexp 10953   abscabs 11741   gcd cgcd 12708   ZZ[_i]cgz 13126

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-mulrcl 8268  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-precex 8279  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285  ax-pre-mulgt0 8286  ax-pre-mulext 8287  ax-arch 8288  ax-caucvg 8289

This theorem depends on definitions:  df-bi 117  df-stab 843  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-po 4436  df-iso 4437  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-sup 7314  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-reap 8893  df-ap 8900  df-div 8993  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-n0 9543  df-z 9624  df-uz 9901  df-q 9999  df-rp 10034  df-fz 10391  df-fzo 10528  df-fl 10683  df-mod 10738  df-seqfrec 10863  df-exp 10954  df-cj 11585  df-re 11586  df-im 11587  df-rsqrt 11742  df-abs 11743  df-dvds 12533  df-gcd 12709  df-gz 13127

This theorem is referenced by:  2sqlem8  16156  2sqlem9  16157