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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 8319 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9229 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9346 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4155 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4128 (class class class)co 6079 1c1 8174 + caddc 8176 < clt 8354 2c2 9338 |
| 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 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 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-addcom 8273 ax-addass 8275 ax-i2m1 8278 ax-0lt1 8279 ax-0id 8281 ax-rnegex 8282 ax-pre-ltadd 8289 |
| This theorem 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 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-xp 4778 df-iota 5335 df-fv 5383 df-ov 6082 df-pnf 8356 df-mnf 8357 df-ltxr 8359 df-2 9346 |
| This theorem is referenced by: 1lt3 9459 1lt4 9462 1lt6 9471 1lt7 9477 1lt8 9484 1lt9 9492 1ne2 9494 1ap2 9495 1le2 9496 halflt1 9505 nn0ge2m1nn 9610 nn0n0n1ge2b 9708 halfnz 9725 1lt10 9898 fztpval 10473 ige2m2fzo 10599 wrdlenge2n0 11323 s3fv1g 11547 sqrt2gt1lt2 11798 ege2le3 12421 cos12dec 12518 ene1 12535 eap1 12536 n2dvds1 12662 bits0o 12700 bitsfzolem 12704 bitsfzo 12705 bitsfi 12707 2prm 12888 3prm 12889 4nprm 12890 isprm5 12903 dec2dvds 13173 dec5nprm 13176 dec2nprm 13177 2expltfac 13201 ballotfilem2 13211 basendxltplusgndx 13450 grpstrg 13463 grpbaseg 13464 grpplusgg 13465 rngstrg 13472 lmodstrd 13501 topgrpstrd 13533 reeff1o 15857 cosz12 15864 2logb9irrALT 16059 sqrt2cxp2logb9e3 16060 mersenne 16094 perfectlem1 16096 perfectlem2 16097 lgseisenlem1 16172 clwwlkext2edg 16646 eupth2lem3lem4fi 16697 |
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