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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 12142 | . 2 ⊢ 1 < 2 | |
2 | 2lt9 12176 | . 2 ⊢ 2 < 9 | |
3 | 1re 10974 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2re 12045 | . . 3 ⊢ 2 ∈ ℝ | |
5 | 9re 12070 | . . 3 ⊢ 9 ∈ ℝ | |
6 | 3, 4, 5 | lttri 11099 | . 2 ⊢ ((1 < 2 ∧ 2 < 9) → 1 < 9) |
7 | 1, 2, 6 | mp2an 689 | 1 ⊢ 1 < 9 |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 5079 1c1 10871 < clt 11008 2c2 12026 9c9 12033 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7580 ax-resscn 10927 ax-1cn 10928 ax-icn 10929 ax-addcl 10930 ax-addrcl 10931 ax-mulcl 10932 ax-mulrcl 10933 ax-mulcom 10934 ax-addass 10935 ax-mulass 10936 ax-distr 10937 ax-i2m1 10938 ax-1ne0 10939 ax-1rid 10940 ax-rnegex 10941 ax-rrecex 10942 ax-cnre 10943 ax-pre-lttri 10944 ax-pre-lttrn 10945 ax-pre-ltadd 10946 ax-pre-mulgt0 10947 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5163 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6389 df-fun 6433 df-fn 6434 df-f 6435 df-f1 6436 df-fo 6437 df-f1o 6438 df-fv 6439 df-riota 7226 df-ov 7272 df-oprab 7273 df-mpo 7274 df-er 8479 df-en 8715 df-dom 8716 df-sdom 8717 df-pnf 11010 df-mnf 11011 df-xr 11012 df-ltxr 11013 df-le 11014 df-sub 11205 df-neg 11206 df-2 12034 df-3 12035 df-4 12036 df-5 12037 df-6 12038 df-7 12039 df-8 12040 df-9 12041 |
This theorem is referenced by: prmlem2 16817 163prm 16822 2503lem3 16836 basendxlttsetndx 17061 otpsstr 17082 ipostr 18243 symgvalstructOLD 19001 cnfldfunOLD 20606 eltpsgOLD 22089 indistpsALTOLD 22160 tuslemOLD 23415 setsmsbasOLD 23625 tngbasOLD 23795 log2tlbnd 26091 hgt750lem 32625 hgt750leme 32632 aks4d1p7 40086 aks4d1p8 40090 fmtno4nprmfac193 44993 2exp340mod341 45152 8exp8mod9 45155 nfermltl8rev 45161 |
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