Theorem 4sqlem6 13077

Description: Lemma for 4sq 13104. (Contributed by Mario Carneiro, 15-Jul-2014.)

Hypotheses

Ref	Expression
4sqlem5.2	|- ( ph -> A e. ZZ )
4sqlem5.3	|- ( ph -> M e. NN )
4sqlem5.4	|- B = ( ( ( A + ( M / 2 ) ) mod M ) - ( M / 2 ) )

Assertion

Ref	Expression
4sqlem6	|- ( ph -> ( -u ( M / 2 ) <_ B /\ B < ( M / 2 ) ) )

Proof of Theorem 4sqlem6

Step	Hyp	Ref	Expression
1		0red 8274	. . . 4 |- ( ph -> 0 e. RR )
2		4sqlem5.2	. . . . . . . 8 |- ( ph -> A e. ZZ )
3		zq 9957	. . . . . . . 8 |- ( A e. ZZ -> A e. QQ )
4	2, 3	syl 14	. . . . . . 7 |- ( ph -> A e. QQ )
5		4sqlem5.3	. . . . . . . . 9 |- ( ph -> M e. NN )
6	5	nnzd 9698	. . . . . . . 8 |- ( ph -> M e. ZZ )
7		2nn 9398	. . . . . . . 8 |- 2 e. NN
8		znq 9955	. . . . . . . 8 |- ( ( M e. ZZ /\ 2 e. NN ) -> ( M / 2 ) e. QQ )
9	6, 7, 8	sylancl 413	. . . . . . 7 |- ( ph -> ( M / 2 ) e. QQ )
10		qaddcl 9966	. . . . . . 7 |- ( ( A e. QQ /\ ( M / 2 ) e. QQ ) -> ( A + ( M / 2 ) ) e. QQ )
11	4, 9, 10	syl2anc 411	. . . . . 6 |- ( ph -> ( A + ( M / 2 ) ) e. QQ )
12		nnq 9964	. . . . . . 7 |- ( M e. NN -> M e. QQ )
13	5, 12	syl 14	. . . . . 6 |- ( ph -> M e. QQ )
14	5	nngt0d 9280	. . . . . 6 |- ( ph -> 0 < M )
15	11, 13, 14	modqcld 10689	. . . . 5 |- ( ph -> ( ( A + ( M / 2 ) ) mod M ) e. QQ )
16		qre 9956	. . . . 5 |- ( ( ( A + ( M / 2 ) ) mod M ) e. QQ -> ( ( A + ( M / 2 ) ) mod M ) e. RR )
17	15, 16	syl 14	. . . 4 |- ( ph -> ( ( A + ( M / 2 ) ) mod M ) e. RR )
18	5	nnred 9249	. . . . 5 |- ( ph -> M e. RR )
19	18	rehalfcld 9484	. . . 4 |- ( ph -> ( M / 2 ) e. RR )
20		modqge0 10693	. . . . 5 |- ( ( ( A + ( M / 2 ) ) e. QQ /\ M e. QQ /\ 0 < M ) -> 0 <_ ( ( A + ( M / 2 ) ) mod M ) )
21	11, 13, 14, 20	syl3anc 1274	. . . 4 |- ( ph -> 0 <_ ( ( A + ( M / 2 ) ) mod M ) )
22	1, 17, 19, 21	lesub1dd 8834	. . 3 |- ( ph -> ( 0 - ( M / 2 ) ) <_ ( ( ( A + ( M / 2 ) ) mod M ) - ( M / 2 ) ) )
23		df-neg 8446	. . 3 |- -u ( M / 2 ) = ( 0 - ( M / 2 ) )
24		4sqlem5.4	. . 3 |- B = ( ( ( A + ( M / 2 ) ) mod M ) - ( M / 2 ) )
25	22, 23, 24	3brtr4g 4142	. 2 |- ( ph -> -u ( M / 2 ) <_ B )
26		modqlt 10694	. . . . . 6 |- ( ( ( A + ( M / 2 ) ) e. QQ /\ M e. QQ /\ 0 < M ) -> ( ( A + ( M / 2 ) ) mod M ) < M )
27	11, 13, 14, 26	syl3anc 1274	. . . . 5 |- ( ph -> ( ( A + ( M / 2 ) ) mod M ) < M )
28	5	nncnd 9250	. . . . . 6 |- ( ph -> M e. CC )
29	28	2halvesd 9483	. . . . 5 |- ( ph -> ( ( M / 2 ) + ( M / 2 ) ) = M )
30	27, 29	breqtrrd 4136	. . . 4 |- ( ph -> ( ( A + ( M / 2 ) ) mod M ) < ( ( M / 2 ) + ( M / 2 ) ) )
31	17, 19, 19	ltsubaddd 8814	. . . 4 |- ( ph -> ( ( ( ( A + ( M / 2 ) ) mod M ) - ( M / 2 ) ) < ( M / 2 ) <-> ( ( A + ( M / 2 ) ) mod M ) < ( ( M / 2 ) + ( M / 2 ) ) ) )
32	30, 31	mpbird 167	. . 3 |- ( ph -> ( ( ( A + ( M / 2 ) ) mod M ) - ( M / 2 ) ) < ( M / 2 ) )
33	24, 32	eqbrtrid 4143	. 2 |- ( ph -> B < ( M / 2 ) )
34	25, 33	jca 306	1 |- ( ph -> ( -u ( M / 2 ) <_ B /\ B < ( M / 2 ) ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1398   e. wcel 2203   class class class wbr 4108  (class class class)co 6049   RRcr 8125   0cc0 8126   + caddc 8129   < clt 8307   <_ cle 8308   - cmin 8443   -ucneg 8444   / cdiv 8945   NNcn 9236   2c2 9287   ZZcz 9576   QQcq 9950   mod cmo 10683

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 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-mulrcl 8225  ax-addcom 8226  ax-mulcom 8227  ax-addass 8228  ax-mulass 8229  ax-distr 8230  ax-i2m1 8231  ax-0lt1 8232  ax-1rid 8233  ax-0id 8234  ax-rnegex 8235  ax-precex 8236  ax-cnre 8237  ax-pre-ltirr 8238  ax-pre-ltwlin 8239  ax-pre-lttrn 8240  ax-pre-apti 8241  ax-pre-ltadd 8242  ax-pre-mulgt0 8243  ax-pre-mulext 8244  ax-arch 8245

This theorem depends on definitions:  df-bi 117  df-3or 1006  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-rmo 2528  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-po 4416  df-iso 4417  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-1st 6333  df-2nd 6334  df-pnf 8309  df-mnf 8310  df-xr 8311  df-ltxr 8312  df-le 8313  df-sub 8445  df-neg 8446  df-reap 8848  df-ap 8855  df-div 8946  df-inn 9237  df-2 9295  df-n0 9496  df-z 9577  df-q 9951  df-rp 9986  df-fl 10629  df-mod 10684

This theorem is referenced by:  4sqlem7  13078  4sqlem10  13081