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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 8332 | . . 3 ⊢ 1 ∈ ℝ | |
| 2 | 1 | ltp1i 9244 | . 2 ⊢ 1 < (1 + 1) |
| 3 | df-2 9373 | . 2 ⊢ 2 = (1 + 1) | |
| 4 | 2, 3 | breqtrri 4158 | 1 ⊢ 1 < 2 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: class class class wbr 4131 (class class class)co 6088 1c1 8187 + caddc 8189 < clt 8367 2c2 9365 |
| 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 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-addcom 8286 ax-addass 8288 ax-i2m1 8291 ax-0lt1 8292 ax-0id 8294 ax-rnegex 8295 ax-pre-ltadd 8302 |
| 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 8369 df-mnf 8370 df-ltxr 8372 df-2 9373 |
| This theorem is used by: 1lt3 9488 1lt4 9491 1lt6 9500 1lt7 9506 1lt8 9513 1lt9 9521 1ne2 9523 1ap2 9524 1le2 9525 halflt1 9534 nn0ge2m1nn 9639 nn0n0n1ge2b 9737 halfnz 9754 1lt10 9932 fztpval 10508 ige2m2fzo 10634 wrdlenge2n0 11363 s3fv1g 11587 sqrt2gt1lt2 11838 ege2le3 12464 cos12dec 12561 ene1 12578 eap1 12579 n2dvds1 12705 bits0o 12743 bitsfzolem 12747 bitsfzo 12748 bitsfi 12750 2prm 12931 3prm 12932 4nprm 12933 isprm5 12947 dec2dvds 13220 dec5nprm 13223 dec2nprm 13224 2expltfac 13249 5prm 13253 6nprm 13254 7prm 13255 8nprm 13256 11prm 13259 13prm 13260 17prm 13261 19prm 13262 37prm 13265 83prm 13267 317prm 13270 631prm 13271 ballotfilem2 13287 basendxltplusgndx 13527 grpstrg 13540 grpbaseg 13541 grpplusgg 13542 rngstrg 13549 lmodstrd 13578 topgrpstrd 13610 reeff1o 16011 cosz12 16019 logdivlt 16136 2logb9irrALT 16222 sqrt2cxp2logb9e3 16223 ppi1 16282 cht1 16283 chtqrpcl 16291 chtqub 16308 mersenne 16309 perfectlem1 16311 perfectlem2 16312 bpos1 16322 bposlem1 16323 bposlem6 16328 bposlem7 16329 bposlem8 16330 lgseisenlem1 16406 clwwlkext2edg 16880 eupth2lem3lem4fi 16931 |
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