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| Mirrors > Home > ILE Home > Th. List > 4pos | Unicode version | ||
| Description: The number 4 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 4pos |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3re 9081 |
. . 3
| |
| 2 | 1re 8042 |
. . 3
| |
| 3 | 3pos 9101 |
. . 3
| |
| 4 | 0lt1 8170 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8535 |
. 2
|
| 6 | df-4 9068 |
. 2
| |
| 7 | 5, 6 | breqtrri 4061 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4034 (class class class)co 5925
|
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-addcom 7996 ax-addass 7998 ax-i2m1 8001 ax-0lt1 8002 ax-0id 8004 ax-rnegex 8005 ax-pre-lttrn 8010 ax-pre-ltadd 8012 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-xp 4670 df-iota 5220 df-fv 5267 df-ov 5928 df-pnf 8080 df-mnf 8081 df-ltxr 8083 df-2 9066 df-3 9067 df-4 9068 |
| This theorem is referenced by: 4ne0 9105 4ap0 9106 5pos 9107 8th4div3 9227 div4p1lem1div2 9262 fldiv4p1lem1div2 10412 iexpcyc 10753 faclbnd2 10851 resqrexlemover 11192 resqrexlemcalc1 11196 resqrexlemcalc2 11197 resqrexlemcalc3 11198 resqrexlemnm 11200 resqrexlemga 11205 sqrt2gt1lt2 11231 flodddiv4 12118 dveflem 15046 coseq0negpitopi 15156 sincos4thpi 15160 gausslemma2dlem0d 15377 |
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