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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 9311 |
. . 3
| |
| 2 | 1re 8273 |
. . 3
| |
| 3 | 3pos 9331 |
. . 3
| |
| 4 | 0lt1 8400 |
. . 3
| |
| 5 | 1, 2, 3, 4 | addgt0ii 8765 |
. 2
|
| 6 | df-4 9298 |
. 2
| |
| 7 | 5, 6 | breqtrri 4136 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 4109 (class class class)co 6050
|
| 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 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-setind 4659 ax-cnex 8218 ax-resscn 8219 ax-1cn 8220 ax-1re 8221 ax-icn 8222 ax-addcl 8223 ax-addrcl 8224 ax-mulcl 8225 ax-addcom 8227 ax-addass 8229 ax-i2m1 8232 ax-0lt1 8233 ax-0id 8235 ax-rnegex 8236 ax-pre-lttrn 8241 ax-pre-ltadd 8243 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-xp 4755 df-iota 5312 df-fv 5360 df-ov 6053 df-pnf 8310 df-mnf 8311 df-ltxr 8313 df-2 9296 df-3 9297 df-4 9298 |
| This theorem is referenced by: 4ne0 9335 4ap0 9336 5pos 9337 8th4div3 9457 div4p1lem1div2 9492 fldiv4p1lem1div2 10665 iexpcyc 11006 faclbnd2 11104 resqrexlemover 11695 resqrexlemcalc1 11699 resqrexlemcalc2 11700 resqrexlemcalc3 11701 resqrexlemnm 11703 resqrexlemga 11708 sqrt2gt1lt2 11734 flodddiv4 12622 dveflem 15591 coseq0negpitopi 15701 sincos4thpi 15705 gausslemma2dlem0d 15925 |
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