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| Mirrors > Home > ILE Home > Th. List > 2lt4 | GIF version | ||
| Description: 2 is less than 4. (Contributed by Mario Carneiro, 15-Sep-2013.) |
| Ref | Expression |
|---|---|
| 2lt4 | ⊢ 2 < 4 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2lt3 9480 | . 2 ⊢ 2 < 3 | |
| 2 | 3lt4 9482 | . 2 ⊢ 3 < 4 | |
| 3 | 2re 9377 | . . 3 ⊢ 2 ∈ ℝ | |
| 4 | 3re 9381 | . . 3 ⊢ 3 ∈ ℝ | |
| 5 | 4re 9384 | . . 3 ⊢ 4 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8432 | . 2 ⊢ ((2 < 3 ∧ 3 < 4) → 2 < 4) |
| 7 | 1, 2, 6 | mp2an 430 | 1 ⊢ 2 < 4 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: class class class wbr 4130 < clt 8361 2c2 9358 3c3 9359 4c4 9360 |
| 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 df-4 9368 |
| This theorem is used by: 1lt4 9484 2lt5 9487 uzuzle24 9973 eluz4eluz2 9978 fz0to4untppr 10542 fzo0to42pr 10649 4bc2eq6 11228 resqrexlemga 11804 sqrt2gt1lt2 11830 cos01bnd 12543 4sqlem12 13203 starvndxnplusgndx 13548 prdsvalstrd 13671 coseq0negpitopi 15990 ppiublem1 16213 bpos1 16232 |
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