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Mirrors > Home > MPE Home > Th. List > 1lt9 | Structured version Visualization version GIF version |
Description: 1 is less than 9. (Contributed by NM, 19-Oct-2012.) (Revised by Mario Carneiro, 9-Mar-2015.) |
Ref | Expression |
---|---|
1lt9 | ⊢ 1 < 9 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1lt2 11536 | . 2 ⊢ 1 < 2 | |
2 | 2lt9 11570 | . 2 ⊢ 2 < 9 | |
3 | 1re 10363 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2re 11432 | . . 3 ⊢ 2 ∈ ℝ | |
5 | 9re 11463 | . . 3 ⊢ 9 ∈ ℝ | |
6 | 3, 4, 5 | lttri 10489 | . 2 ⊢ ((1 < 2 ∧ 2 < 9) → 1 < 9) |
7 | 1, 2, 6 | mp2an 683 | 1 ⊢ 1 < 9 |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 4875 1c1 10260 < clt 10398 2c2 11413 9c9 11420 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1894 ax-4 1908 ax-5 2009 ax-6 2075 ax-7 2112 ax-8 2166 ax-9 2173 ax-10 2192 ax-11 2207 ax-12 2220 ax-13 2389 ax-ext 2803 ax-sep 5007 ax-nul 5015 ax-pow 5067 ax-pr 5129 ax-un 7214 ax-resscn 10316 ax-1cn 10317 ax-icn 10318 ax-addcl 10319 ax-addrcl 10320 ax-mulcl 10321 ax-mulrcl 10322 ax-mulcom 10323 ax-addass 10324 ax-mulass 10325 ax-distr 10326 ax-i2m1 10327 ax-1ne0 10328 ax-1rid 10329 ax-rnegex 10330 ax-rrecex 10331 ax-cnre 10332 ax-pre-lttri 10333 ax-pre-lttrn 10334 ax-pre-ltadd 10335 ax-pre-mulgt0 10336 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 879 df-3or 1112 df-3an 1113 df-tru 1660 df-ex 1879 df-nf 1883 df-sb 2068 df-mo 2605 df-eu 2640 df-clab 2812 df-cleq 2818 df-clel 2821 df-nfc 2958 df-ne 3000 df-nel 3103 df-ral 3122 df-rex 3123 df-reu 3124 df-rab 3126 df-v 3416 df-sbc 3663 df-csb 3758 df-dif 3801 df-un 3803 df-in 3805 df-ss 3812 df-nul 4147 df-if 4309 df-pw 4382 df-sn 4400 df-pr 4402 df-op 4406 df-uni 4661 df-br 4876 df-opab 4938 df-mpt 4955 df-id 5252 df-po 5265 df-so 5266 df-xp 5352 df-rel 5353 df-cnv 5354 df-co 5355 df-dm 5356 df-rn 5357 df-res 5358 df-ima 5359 df-iota 6090 df-fun 6129 df-fn 6130 df-f 6131 df-f1 6132 df-fo 6133 df-f1o 6134 df-fv 6135 df-riota 6871 df-ov 6913 df-oprab 6914 df-mpt2 6915 df-er 8014 df-en 8229 df-dom 8230 df-sdom 8231 df-pnf 10400 df-mnf 10401 df-xr 10402 df-ltxr 10403 df-le 10404 df-sub 10594 df-neg 10595 df-2 11421 df-3 11422 df-4 11423 df-5 11424 df-6 11425 df-7 11426 df-8 11427 df-9 11428 |
This theorem is referenced by: prmlem2 16199 163prm 16204 2503lem3 16218 resstset 16412 otpsstr 16415 ipostr 17513 cnfldfun 20125 eltpsg 21125 indistpsALT 21195 tuslem 22448 setsmsbas 22657 tngbas 22822 log2tlbnd 25092 hgt750lem 31274 hgt750leme 31281 fmtno4nprmfac193 42330 |
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