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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 9407 | . 2 ⊢ 1 < 2 | |
| 2 | 2lt3 9408 | . 2 ⊢ 2 < 3 | |
| 3 | 1re 8273 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2re 9307 | . . 3 ⊢ 2 ∈ ℝ | |
| 5 | 3re 9311 | . . 3 ⊢ 3 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8378 | . 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 4109 1c1 8128 < clt 8308 2c2 9288 3c3 9289 |
| 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 |
| This theorem is referenced by: 1le3 9449 fztpval 10417 expnass 11007 hashtpglem 11218 sin01gt0 12448 3prm 12825 basendxnmulrndx 13347 2lgslem3 15974 usgrexmpldifpr 16244 konigsberglem2 16484 konigsberglem3 16485 konigsberglem5 16487 |
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