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| Mirrors > Home > ILE Home > Th. List > 1lt2 | GIF version | ||
| Description: 1 is less than 2. (Contributed by NM, 24-Feb-2005.) |
| Ref | Expression |
|---|---|
| 1lt2 | ⊢ 1 < 2 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 8325 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9236 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9364 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4157 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: class class class wbr 4130 (class class class)co 6085 1c1 8180 + caddc 8182 < clt 8360 2c2 9356 |
| 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 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-addcom 8279 ax-addass 8281 ax-i2m1 8284 ax-0lt1 8285 ax-0id 8287 ax-rnegex 8288 ax-pre-ltadd 8295 |
| 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 8362 df-mnf 8363 df-ltxr 8365 df-2 9364 |
| This theorem is used by: 1lt3 9478 1lt4 9481 1lt6 9490 1lt7 9496 1lt8 9503 1lt9 9511 1ne2 9513 1ap2 9514 1le2 9515 halflt1 9524 nn0ge2m1nn 9629 nn0n0n1ge2b 9727 halfnz 9744 1lt10 9917 fztpval 10492 ige2m2fzo 10618 wrdlenge2n0 11342 s3fv1g 11566 sqrt2gt1lt2 11817 ege2le3 12440 cos12dec 12537 ene1 12554 eap1 12555 n2dvds1 12681 bits0o 12719 bitsfzolem 12723 bitsfzo 12724 bitsfi 12726 2prm 12907 3prm 12908 4nprm 12909 isprm5 12922 dec2dvds 13192 dec5nprm 13195 dec2nprm 13196 2expltfac 13220 ballotfilem2 13230 basendxltplusgndx 13469 grpstrg 13482 grpbaseg 13483 grpplusgg 13484 rngstrg 13491 lmodstrd 13520 topgrpstrd 13552 reeff1o 15876 cosz12 15884 logdivlt 15999 2logb9irrALT 16082 sqrt2cxp2logb9e3 16083 mersenne 16117 perfectlem1 16119 perfectlem2 16120 lgseisenlem1 16201 clwwlkext2edg 16675 eupth2lem3lem4fi 16726 |
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