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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 8289 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9196 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9313 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4141 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4114 (class class class)co 6058 1c1 8144 + caddc 8146 < clt 8324 2c2 9305 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-addcom 8243 ax-addass 8245 ax-i2m1 8248 ax-0lt1 8249 ax-0id 8251 ax-rnegex 8252 ax-pre-ltadd 8259 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-opab 4177 df-xp 4760 df-iota 5317 df-fv 5365 df-ov 6061 df-pnf 8326 df-mnf 8327 df-ltxr 8329 df-2 9313 |
| This theorem is referenced by: 1lt3 9426 1lt4 9429 1lt6 9438 1lt7 9444 1lt8 9451 1lt9 9459 1ne2 9461 1ap2 9462 1le2 9463 halflt1 9472 nn0ge2m1nn 9577 nn0n0n1ge2b 9675 halfnz 9692 1lt10 9865 fztpval 10439 ige2m2fzo 10565 wrdlenge2n0 11285 s3fv1g 11509 sqrt2gt1lt2 11759 ege2le3 12382 cos12dec 12479 ene1 12496 eap1 12497 n2dvds1 12623 bits0o 12661 bitsfzolem 12665 bitsfzo 12666 bitsfi 12668 2prm 12849 3prm 12850 4nprm 12851 isprm5 12864 dec2dvds 13134 dec5nprm 13137 dec2nprm 13138 2expltfac 13162 ballotfilem2 13172 basendxltplusgndx 13410 grpstrg 13423 grpbaseg 13424 grpplusgg 13425 rngstrg 13432 lmodstrd 13461 topgrpstrd 13493 reeff1o 15750 cosz12 15757 2logb9irrALT 15951 sqrt2cxp2logb9e3 15952 mersenne 15977 perfectlem1 15979 perfectlem2 15980 lgseisenlem1 16055 clwwlkext2edg 16529 eupth2lem3lem4fi 16580 |
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