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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 9485 | . 2 ⊢ 1 < 2 | |
| 2 | 2lt3 9486 | . 2 ⊢ 2 < 3 | |
| 3 | 1re 8331 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2re 9383 | . . 3 ⊢ 2 ∈ ℝ | |
| 5 | 3re 9387 | . . 3 ⊢ 3 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8437 | . 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 4131 1c1 8186 < clt 8366 2c2 9364 3c3 9365 |
| 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 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-addass 8287 ax-i2m1 8290 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| 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 4132 df-opab 4194 df-xp 4782 df-iota 5340 df-fv 5388 df-ov 6091 df-pnf 8368 df-mnf 8369 df-ltxr 8371 df-2 9372 df-3 9373 |
| This theorem is used by: 1le3 9527 fztpval 10507 expnass 11103 hashtpglem 11320 sin01gt0 12554 3prm 12931 6nprm 13253 7prm 13254 9nprm 13256 13prm 13259 19prm 13261 prmlem2 13263 37prm 13264 43prm 13265 139prm 13267 163prm 13268 631prm 13270 basendxnmulrndx 13547 2lgslem3 16425 usgrexmpldifpr 16695 konigsberglem2 16935 konigsberglem3 16936 konigsberglem5 16938 |
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