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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 8221 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9128 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9245 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4120 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4093 (class class class)co 6028 1c1 8076 + caddc 8078 < clt 8257 2c2 9237 |
| 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 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-addcom 8175 ax-addass 8177 ax-i2m1 8180 ax-0lt1 8181 ax-0id 8183 ax-rnegex 8184 ax-pre-ltadd 8191 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-xp 4737 df-iota 5293 df-fv 5341 df-ov 6031 df-pnf 8259 df-mnf 8260 df-ltxr 8262 df-2 9245 |
| This theorem is referenced by: 1lt3 9358 1lt4 9361 1lt6 9370 1lt7 9376 1lt8 9383 1lt9 9391 1ne2 9393 1ap2 9394 1le2 9395 halflt1 9404 nn0ge2m1nn 9505 nn0n0n1ge2b 9602 halfnz 9619 1lt10 9792 fztpval 10361 ige2m2fzo 10487 wrdlenge2n0 11196 s3fv1g 11420 sqrt2gt1lt2 11670 ege2le3 12293 cos12dec 12390 ene1 12407 eap1 12408 n2dvds1 12534 bits0o 12572 bitsfzolem 12576 bitsfzo 12577 bitsfi 12579 2prm 12760 3prm 12761 4nprm 12762 isprm5 12775 dec2dvds 13045 dec5nprm 13048 dec2nprm 13049 2expltfac 13073 basendxltplusgndx 13257 grpstrg 13270 grpbaseg 13271 grpplusgg 13272 rngstrg 13279 lmodstrd 13308 topgrpstrd 13340 reeff1o 15564 cosz12 15571 2logb9irrALT 15765 sqrt2cxp2logb9e3 15766 mersenne 15791 perfectlem1 15793 perfectlem2 15794 lgseisenlem1 15869 clwwlkext2edg 16343 eupth2lem3lem4fi 16394 |
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