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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 9145 |
. . 3
| |
| 2 | 1re 8106 |
. . 3
| |
| 3 | 3pos 9165 |
. . 3
| |
| 4 | 0lt1 8234 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8599 |
. 2
|
| 6 | df-4 9132 |
. 2
| |
| 7 | 5, 6 | breqtrri 4086 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4059 (class class class)co 5967
|
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-pow 4234 ax-pr 4269 ax-un 4498 ax-setind 4603 ax-cnex 8051 ax-resscn 8052 ax-1cn 8053 ax-1re 8054 ax-icn 8055 ax-addcl 8056 ax-addrcl 8057 ax-mulcl 8058 ax-addcom 8060 ax-addass 8062 ax-i2m1 8065 ax-0lt1 8066 ax-0id 8068 ax-rnegex 8069 ax-pre-lttrn 8074 ax-pre-ltadd 8076 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-nel 2474 df-ral 2491 df-rex 2492 df-rab 2495 df-v 2778 df-dif 3176 df-un 3178 df-in 3180 df-ss 3187 df-pw 3628 df-sn 3649 df-pr 3650 df-op 3652 df-uni 3865 df-br 4060 df-opab 4122 df-xp 4699 df-iota 5251 df-fv 5298 df-ov 5970 df-pnf 8144 df-mnf 8145 df-ltxr 8147 df-2 9130 df-3 9131 df-4 9132 |
| This theorem is referenced by: 4ne0 9169 4ap0 9170 5pos 9171 8th4div3 9291 div4p1lem1div2 9326 fldiv4p1lem1div2 10485 iexpcyc 10826 faclbnd2 10924 resqrexlemover 11436 resqrexlemcalc1 11440 resqrexlemcalc2 11441 resqrexlemcalc3 11442 resqrexlemnm 11444 resqrexlemga 11449 sqrt2gt1lt2 11475 flodddiv4 12362 dveflem 15313 coseq0negpitopi 15423 sincos4thpi 15427 gausslemma2dlem0d 15644 |
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