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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 9357 |
. . 3
| |
| 2 | 1re 8315 |
. . 3
| |
| 3 | 3pos 9377 |
. . 3
| |
| 4 | 0lt1 8443 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8809 |
. 2
|
| 6 | df-4 9344 |
. 2
| |
| 7 | 5, 6 | breqtrri 4152 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4125 (class class class)co 6075
|
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-addcom 8269 ax-addass 8271 ax-i2m1 8274 ax-0lt1 8275 ax-0id 8277 ax-rnegex 8278 ax-pre-lttrn 8283 ax-pre-ltadd 8285 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-br 4126 df-opab 4188 df-xp 4775 df-iota 5332 df-fv 5380 df-ov 6078 df-pnf 8352 df-mnf 8353 df-ltxr 8355 df-2 9342 df-3 9343 df-4 9344 |
| This theorem is referenced by: 4ne0 9381 4ap0 9382 5pos 9383 8th4div3 9503 div4p1lem1div2 9538 fldiv4p1lem1div2 10718 iexpcyc 11059 faclbnd2 11158 resqrexlemover 11754 resqrexlemcalc1 11758 resqrexlemcalc2 11759 resqrexlemcalc3 11760 resqrexlemnm 11762 resqrexlemga 11767 sqrt2gt1lt2 11793 flodddiv4 12681 dveflem 15750 coseq0negpitopi 15860 sincos4thpi 15864 gausslemma2dlem0d 16085 |
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