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| Mirrors > Home > ILE Home > Th. List > 1lt2 | Unicode version | ||
| Description: 1 is less than 2. (Contributed by NM, 24-Feb-2005.) |
| Ref | Expression |
|---|---|
| 1lt2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 8331 |
. . 3
| |
| 2 | 1 | ltp1i 9243 |
. 2
|
| 3 | df-2 9372 |
. 2
| |
| 4 | 2, 3 | breqtrri 4158 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
class class class wbr 4131 (class class class)co 6088
|
| 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 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-addass 8287 ax-i2m1 8290 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-pre-ltadd 8301 |
| 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 4132 df-opab 4194 df-xp 4782 df-iota 5340 df-fv 5388 df-ov 6091 df-pnf 8368 df-mnf 8369 df-ltxr 8371 df-2 9372 |
| This theorem is used by: 1lt3 9487 1lt4 9490 1lt6 9499 1lt7 9505 1lt8 9512 1lt9 9520 1ne2 9522 1ap2 9523 1le2 9524 halflt1 9533 nn0ge2m1nn 9636 nn0n0n1ge2b 9734 halfnz 9752 1lt10 9930 fztpval 10506 ige2m2fzo 10632 wrdlenge2n0 11361 s3fv1g 11585 sqrt2gt1lt2 11836 ege2le3 12462 cos12dec 12559 ene1 12576 eap1 12577 n2dvds1 12703 bits0o 12741 bitsfzolem 12745 bitsfzo 12746 bitsfi 12748 2prm 12929 3prm 12930 4nprm 12931 isprm5 12945 dec2dvds 13218 dec5nprm 13221 dec2nprm 13222 2expltfac 13247 5prm 13251 6nprm 13252 7prm 13253 8nprm 13254 11prm 13257 13prm 13258 17prm 13259 19prm 13260 37prm 13263 83prm 13265 317prm 13268 631prm 13269 ballotfilem2 13285 basendxltplusgndx 13525 grpstrg 13538 grpbaseg 13539 grpplusgg 13540 rngstrg 13547 lmodstrd 13576 topgrpstrd 13608 reeff1o 16016 cosz12 16024 logdivlt 16141 2logb9irrALT 16227 sqrt2cxp2logb9e3 16228 ppi1 16287 cht1 16288 chtqrpcl 16296 chtqub 16313 mersenne 16314 perfectlem1 16316 perfectlem2 16317 bpos1 16327 bposlem1 16328 bposlem6 16333 bposlem7 16334 bposlem8 16335 lgseisenlem1 16411 clwwlkext2edg 16885 eupth2lem3lem4fi 16936 |
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