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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 11809 | . 2 ⊢ 1 < 2 | |
2 | 2lt9 11843 | . 2 ⊢ 2 < 9 | |
3 | 1re 10641 | . . 3 ⊢ 1 ∈ ℝ | |
4 | 2re 11712 | . . 3 ⊢ 2 ∈ ℝ | |
5 | 9re 11737 | . . 3 ⊢ 9 ∈ ℝ | |
6 | 3, 4, 5 | lttri 10766 | . 2 ⊢ ((1 < 2 ∧ 2 < 9) → 1 < 9) |
7 | 1, 2, 6 | mp2an 690 | 1 ⊢ 1 < 9 |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 5066 1c1 10538 < clt 10675 2c2 11693 9c9 11700 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-po 5474 df-so 5475 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 df-9 11708 |
This theorem is referenced by: prmlem2 16453 163prm 16458 2503lem3 16472 resstset 16665 otpsstr 16668 ipostr 17763 symgvalstruct 18525 cnfldfun 20557 eltpsg 21551 indistpsALT 21621 tuslem 22876 setsmsbas 23085 tngbas 23250 log2tlbnd 25523 hgt750lem 31922 hgt750leme 31929 fmtno4nprmfac193 43756 2exp340mod341 43918 8exp8mod9 43921 nfermltl8rev 43927 |
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