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| Mirrors > Home > ILE Home > Th. List > 7pos | GIF version | ||
| Description: The number 7 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 7pos | ⊢ 0 < 7 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 6re 9364 | . . 3 ⊢ 6 ∈ ℝ | |
| 2 | 1re 8315 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 6pos 9384 | . . 3 ⊢ 0 < 6 | |
| 4 | 0lt1 8443 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8809 | . 2 ⊢ 0 < (6 + 1) |
| 6 | df-7 9347 | . 2 ⊢ 7 = (6 + 1) | |
| 7 | 5, 6 | breqtrri 4152 | 1 ⊢ 0 < 7 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4125 (class class class)co 6075 0cc0 8169 1c1 8170 + caddc 8172 < clt 8350 6c6 9338 7c7 9339 |
| 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 df-5 9345 df-6 9346 df-7 9347 |
| This theorem is referenced by: 8pos 9386 lgsdir2lem1 16061 |
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