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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 9276 |
. . 3
| |
| 2 | 1re 8238 |
. . 3
| |
| 3 | 3pos 9296 |
. . 3
| |
| 4 | 0lt1 8365 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8730 |
. 2
|
| 6 | df-4 9263 |
. 2
| |
| 7 | 5, 6 | breqtrri 4120 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4093 (class class class)co 6028
|
| 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 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8183 ax-resscn 8184 ax-1cn 8185 ax-1re 8186 ax-icn 8187 ax-addcl 8188 ax-addrcl 8189 ax-mulcl 8190 ax-addcom 8192 ax-addass 8194 ax-i2m1 8197 ax-0lt1 8198 ax-0id 8200 ax-rnegex 8201 ax-pre-lttrn 8206 ax-pre-ltadd 8208 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-xp 4737 df-iota 5293 df-fv 5341 df-ov 6031 df-pnf 8275 df-mnf 8276 df-ltxr 8278 df-2 9261 df-3 9262 df-4 9263 |
| This theorem is referenced by: 4ne0 9300 4ap0 9301 5pos 9302 8th4div3 9422 div4p1lem1div2 9457 fldiv4p1lem1div2 10628 iexpcyc 10969 faclbnd2 11067 resqrexlemover 11650 resqrexlemcalc1 11654 resqrexlemcalc2 11655 resqrexlemcalc3 11656 resqrexlemnm 11658 resqrexlemga 11663 sqrt2gt1lt2 11689 flodddiv4 12577 dveflem 15537 coseq0negpitopi 15647 sincos4thpi 15651 gausslemma2dlem0d 15871 |
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