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Theorem addgtge0 8593
Description: The sum of nonnegative and positive numbers is positive. (Contributed by NM, 28-Dec-2005.) (Proof shortened by Andrew Salmon, 19-Nov-2011.)
Assertion
Ref Expression
addgtge0  |-  ( ( ( A  e.  RR  /\  B  e.  RR )  /\  ( 0  < 
A  /\  0  <_  B ) )  ->  0  <  ( A  +  B
) )

Proof of Theorem addgtge0
StepHypRef Expression
1 00id 8283 . 2  |-  ( 0  +  0 )  =  0
2 0re 8142 . . . 4  |-  0  e.  RR
3 ltleadd 8589 . . . 4  |-  ( ( ( 0  e.  RR  /\  0  e.  RR )  /\  ( A  e.  RR  /\  B  e.  RR ) )  -> 
( ( 0  < 
A  /\  0  <_  B )  ->  ( 0  +  0 )  < 
( A  +  B
) ) )
42, 2, 3mpanl12 436 . . 3  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( ( 0  < 
A  /\  0  <_  B )  ->  ( 0  +  0 )  < 
( A  +  B
) ) )
54imp 124 . 2  |-  ( ( ( A  e.  RR  /\  B  e.  RR )  /\  ( 0  < 
A  /\  0  <_  B ) )  ->  (
0  +  0 )  <  ( A  +  B ) )
61, 5eqbrtrrid 4118 1  |-  ( ( ( A  e.  RR  /\  B  e.  RR )  /\  ( 0  < 
A  /\  0  <_  B ) )  ->  0  <  ( A  +  B
) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2200   class class class wbr 4082  (class class class)co 6000   RRcr 7994   0cc0 7995    + caddc 7998    < clt 8177    <_ cle 8178
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 4201  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-setind 4628  ax-cnex 8086  ax-resscn 8087  ax-1cn 8088  ax-1re 8089  ax-icn 8090  ax-addcl 8091  ax-addrcl 8092  ax-mulcl 8093  ax-addcom 8095  ax-addass 8097  ax-i2m1 8100  ax-0id 8103  ax-rnegex 8104  ax-pre-ltwlin 8108  ax-pre-ltadd 8111
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-rab 2517  df-v 2801  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 3888  df-br 4083  df-opab 4145  df-xp 4724  df-cnv 4726  df-iota 5277  df-fv 5325  df-ov 6003  df-pnf 8179  df-mnf 8180  df-xr 8181  df-ltxr 8182  df-le 8183
This theorem is referenced by:  addgtge0d  8663  recexaplem2  8795  recp1lt1  9042  resqrexlem1arp  11511  resqrexlemp1rp  11512  resqrexlemglsq  11528
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