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| Mirrors > Home > ILE Home > Th. List > 1lt3 | GIF version | ||
| Description: 1 is less than 3. (Contributed by NM, 26-Sep-2010.) |
| Ref | Expression |
|---|---|
| 1lt3 | ⊢ 1 < 3 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1lt2 9478 | . 2 ⊢ 1 < 2 | |
| 2 | 2lt3 9479 | . 2 ⊢ 2 < 3 | |
| 3 | 1re 8325 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2re 9376 | . . 3 ⊢ 2 ∈ ℝ | |
| 5 | 3re 9380 | . . 3 ⊢ 3 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8431 | . 2 ⊢ ((1 < 2 ∧ 2 < 3) → 1 < 3) |
| 7 | 1, 2, 6 | mp2an 430 | 1 ⊢ 1 < 3 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: class class class wbr 4130 1c1 8180 < clt 8360 2c2 9357 3c3 9358 |
| This proof depends on 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 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-i2m1 8284 ax-0lt1 8285 ax-0id 8287 ax-rnegex 8288 ax-pre-lttrn 8293 ax-pre-ltadd 8295 |
| This proof 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 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-xp 4780 df-iota 5337 df-fv 5385 df-ov 6088 df-pnf 8362 df-mnf 8363 df-ltxr 8365 df-2 9365 df-3 9366 |
| This theorem is used by: 1le3 9520 fztpval 10500 expnass 11095 hashtpglem 11312 sin01gt0 12545 3prm 12922 6nprm 13244 7prm 13245 9nprm 13247 13prm 13250 19prm 13252 prmlem2 13254 37prm 13255 43prm 13256 139prm 13258 163prm 13259 631prm 13261 basendxnmulrndx 13537 2lgslem3 16318 usgrexmpldifpr 16588 konigsberglem2 16828 konigsberglem3 16829 konigsberglem5 16831 |
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