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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 9301 | . 2 ⊢ 1 < 2 | |
| 2 | 2lt3 9302 | . 2 ⊢ 2 < 3 | |
| 3 | 1re 8166 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2re 9201 | . . 3 ⊢ 2 ∈ ℝ | |
| 5 | 3re 9205 | . . 3 ⊢ 3 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8272 | . 2 ⊢ ((1 < 2 ∧ 2 < 3) → 1 < 3) |
| 7 | 1, 2, 6 | mp2an 426 | 1 ⊢ 1 < 3 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4084 1c1 8021 < clt 8202 2c2 9182 3c3 9183 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4203 ax-pow 4260 ax-pr 4295 ax-un 4526 ax-setind 4631 ax-cnex 8111 ax-resscn 8112 ax-1cn 8113 ax-1re 8114 ax-icn 8115 ax-addcl 8116 ax-addrcl 8117 ax-mulcl 8118 ax-addcom 8120 ax-addass 8122 ax-i2m1 8125 ax-0lt1 8126 ax-0id 8128 ax-rnegex 8129 ax-pre-lttrn 8134 ax-pre-ltadd 8136 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3890 df-br 4085 df-opab 4147 df-xp 4727 df-iota 5282 df-fv 5330 df-ov 6014 df-pnf 8204 df-mnf 8205 df-ltxr 8207 df-2 9190 df-3 9191 |
| This theorem is referenced by: 1le3 9343 fztpval 10306 expnass 10895 sin01gt0 12310 3prm 12687 basendxnmulrndx 13204 2lgslem3 15817 usgrexmpldifpr 16084 |
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