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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 8171 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9078 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9195 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4113 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4086 (class class class)co 6013 1c1 8026 + caddc 8028 < clt 8207 2c2 9187 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-cnex 8116 ax-resscn 8117 ax-1cn 8118 ax-1re 8119 ax-icn 8120 ax-addcl 8121 ax-addrcl 8122 ax-mulcl 8123 ax-addcom 8125 ax-addass 8127 ax-i2m1 8130 ax-0lt1 8131 ax-0id 8133 ax-rnegex 8134 ax-pre-ltadd 8141 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-xp 4729 df-iota 5284 df-fv 5332 df-ov 6016 df-pnf 8209 df-mnf 8210 df-ltxr 8212 df-2 9195 |
| This theorem is referenced by: 1lt3 9308 1lt4 9311 1lt6 9320 1lt7 9326 1lt8 9333 1lt9 9341 1ne2 9343 1ap2 9344 1le2 9345 halflt1 9354 nn0ge2m1nn 9455 nn0n0n1ge2b 9552 halfnz 9569 1lt10 9742 fztpval 10311 ige2m2fzo 10436 wrdlenge2n0 11142 s3fv1g 11366 sqrt2gt1lt2 11603 ege2le3 12225 cos12dec 12322 ene1 12339 eap1 12340 n2dvds1 12466 bits0o 12504 bitsfzolem 12508 bitsfzo 12509 bitsfi 12511 2prm 12692 3prm 12693 4nprm 12694 isprm5 12707 dec2dvds 12977 dec5nprm 12980 dec2nprm 12981 2expltfac 13005 basendxltplusgndx 13189 grpstrg 13202 grpbaseg 13203 grpplusgg 13204 rngstrg 13211 lmodstrd 13240 topgrpstrd 13272 reeff1o 15490 cosz12 15497 2logb9irrALT 15691 sqrt2cxp2logb9e3 15692 mersenne 15714 perfectlem1 15716 perfectlem2 15717 lgseisenlem1 15792 clwwlkext2edg 16231 |
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