Theorem difgtsumgt 9527

Description: If the difference of a real number and a nonnegative integer is greater than another real number, the sum of the real number and the nonnegative integer is also greater than the other real number. (Contributed by AV, 13-Aug-2021.)

Assertion

Ref	Expression
difgtsumgt	|- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( C < ( A - B ) -> C < ( A + B ) ) )

Proof of Theorem difgtsumgt

Step	Hyp	Ref	Expression
1		recn 8143	. . . . . . 7 |- ( A e. RR -> A e. CC )
2		nn0cn 9390	. . . . . . 7 |- ( B e. NN0 -> B e. CC )
3	1, 2	anim12i 338	. . . . . 6 |- ( ( A e. RR /\ B e. NN0 ) -> ( A e. CC /\ B e. CC ) )
4	3	3adant3 1041	. . . . 5 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A e. CC /\ B e. CC ) )
5		negsub 8405	. . . . 5 |- ( ( A e. CC /\ B e. CC ) -> ( A + -u B ) = ( A - B ) )
6	4, 5	syl 14	. . . 4 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A + -u B ) = ( A - B ) )
7	6	eqcomd 2235	. . 3 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A - B ) = ( A + -u B ) )
8	7	breq2d 4095	. 2 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( C < ( A - B ) <-> C < ( A + -u B ) ) )
9		simp3 1023	. . . 4 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> C e. RR )
10		simp1 1021	. . . . 5 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> A e. RR )
11		nn0re 9389	. . . . . . 7 |- ( B e. NN0 -> B e. RR )
12	11	renegcld 8537	. . . . . 6 |- ( B e. NN0 -> -u B e. RR )
13	12	3ad2ant2 1043	. . . . 5 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> -u B e. RR )
14	10, 13	readdcld 8187	. . . 4 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A + -u B ) e. RR )
15	11	3ad2ant2 1043	. . . . 5 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> B e. RR )
16	10, 15	readdcld 8187	. . . 4 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A + B ) e. RR )
17	9, 14, 16	3jca 1201	. . 3 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( C e. RR /\ ( A + -u B ) e. RR /\ ( A + B ) e. RR ) )
18		nn0negleid 9526	. . . . 5 |- ( B e. NN0 -> -u B <_ B )
19	18	3ad2ant2 1043	. . . 4 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> -u B <_ B )
20	13, 15, 10, 19	leadd2dd 8718	. . 3 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( A + -u B ) <_ ( A + B ) )
21	17, 20	lelttrdi 8584	. 2 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( C < ( A + -u B ) -> C < ( A + B ) ) )
22	8, 21	sylbid 150	1 |- ( ( A e. RR /\ B e. NN0 /\ C e. RR ) -> ( C < ( A - B ) -> C < ( A + B ) ) )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1002   = wceq 1395   e. wcel 2200   class class class wbr 4083  (class class class)co 6007   CCcc 8008   RRcr 8009   + caddc 8013   < clt 8192   <_ cle 8193   - cmin 8328   -ucneg 8329   NN0cn0 9380

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8101  ax-resscn 8102  ax-1cn 8103  ax-1re 8104  ax-icn 8105  ax-addcl 8106  ax-addrcl 8107  ax-mulcl 8108  ax-addcom 8110  ax-addass 8112  ax-distr 8114  ax-i2m1 8115  ax-0lt1 8116  ax-0id 8118  ax-rnegex 8119  ax-cnre 8121  ax-pre-ltirr 8122  ax-pre-ltwlin 8123  ax-pre-lttrn 8124  ax-pre-ltadd 8126

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-br 4084  df-opab 4146  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-iota 5278  df-fun 5320  df-fv 5326  df-riota 5960  df-ov 6010  df-oprab 6011  df-mpo 6012  df-pnf 8194  df-mnf 8195  df-xr 8196  df-ltxr 8197  df-le 8198  df-sub 8330  df-neg 8331  df-inn 9122  df-n0 9381

This theorem is referenced by:  difsqpwdvds  12877