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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 8326 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9238 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9366 | . 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 8181 + caddc 8183 < clt 8361 2c2 9358 |
| 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-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 |
| This theorem is used by: 1lt3 9481 1lt4 9484 1lt6 9493 1lt7 9499 1lt8 9506 1lt9 9514 1ne2 9516 1ap2 9517 1le2 9518 halflt1 9527 nn0ge2m1nn 9632 nn0n0n1ge2b 9730 halfnz 9747 1lt10 9925 fztpval 10501 ige2m2fzo 10627 wrdlenge2n0 11355 s3fv1g 11579 sqrt2gt1lt2 11830 ege2le3 12456 cos12dec 12553 ene1 12570 eap1 12571 n2dvds1 12697 bits0o 12735 bitsfzolem 12739 bitsfzo 12740 bitsfi 12742 2prm 12923 3prm 12924 4nprm 12925 isprm5 12939 dec2dvds 13212 dec5nprm 13215 dec2nprm 13216 2expltfac 13241 5prm 13245 6nprm 13246 7prm 13247 8nprm 13248 11prm 13251 13prm 13252 17prm 13253 19prm 13254 37prm 13257 83prm 13259 317prm 13262 631prm 13263 ballotfilem2 13279 basendxltplusgndx 13518 grpstrg 13531 grpbaseg 13532 grpplusgg 13533 rngstrg 13540 lmodstrd 13569 topgrpstrd 13601 reeff1o 15926 cosz12 15934 logdivlt 16049 2logb9irrALT 16132 sqrt2cxp2logb9e3 16133 ppi1 16192 cht1 16193 chtqrpcl 16201 chtqub 16218 mersenne 16219 perfectlem1 16221 perfectlem2 16222 bpos1 16232 bposlem1 16233 lgseisenlem1 16311 clwwlkext2edg 16785 eupth2lem3lem4fi 16836 |
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