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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 9479 | . 2 ⊢ 1 < 2 | |
| 2 | 2lt3 9480 | . 2 ⊢ 2 < 3 | |
| 3 | 1re 8326 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2re 9377 | . . 3 ⊢ 2 ∈ ℝ | |
| 5 | 3re 9381 | . . 3 ⊢ 3 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8432 | . 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 8181 < clt 8361 2c2 9358 3c3 9359 |
| 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 8271 ax-resscn 8272 ax-1cn 8273 ax-1re 8274 ax-icn 8275 ax-addcl 8276 ax-addrcl 8277 ax-mulcl 8278 ax-addcom 8280 ax-addass 8282 ax-i2m1 8285 ax-0lt1 8286 ax-0id 8288 ax-rnegex 8289 ax-pre-lttrn 8294 ax-pre-ltadd 8296 |
| 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 8363 df-mnf 8364 df-ltxr 8366 df-2 9366 df-3 9367 |
| This theorem is used by: 1le3 9521 fztpval 10501 expnass 11097 hashtpglem 11314 sin01gt0 12548 3prm 12925 6nprm 13247 7prm 13248 9nprm 13250 13prm 13253 19prm 13255 prmlem2 13257 37prm 13258 43prm 13259 139prm 13261 163prm 13262 631prm 13264 basendxnmulrndx 13541 2lgslem3 16386 usgrexmpldifpr 16656 konigsberglem2 16896 konigsberglem3 16897 konigsberglem5 16899 |
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