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Mirrors > Home > MPE Home > Th. List > halfgt0 | Structured version Visualization version GIF version |
Description: One-half is greater than zero. (Contributed by NM, 24-Feb-2005.) |
Ref | Expression |
---|---|
halfgt0 | ⊢ 0 < (1 / 2) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2re 10967 | . 2 ⊢ 2 ∈ ℝ | |
2 | 2pos 10989 | . 2 ⊢ 0 < 2 | |
3 | 1, 2 | recgt0ii 10808 | 1 ⊢ 0 < (1 / 2) |
Colors of variables: wff setvar class |
Syntax hints: class class class wbr 4583 (class class class)co 6549 0cc0 9815 1c1 9816 < clt 9953 / cdiv 10563 2c2 10947 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-po 4959 df-so 4960 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-2 10956 |
This theorem is referenced by: halfge0 11126 geo2sum 14443 geo2lim 14445 oddge22np1 14911 ltoddhalfle 14923 halfleoddlt 14924 bitsp1o 14993 htpycc 22587 pco0 22622 pcoval2 22624 pcocn 22625 pcohtpylem 22627 pcopt 22630 pcopt2 22631 pcoass 22632 pcorevlem 22634 mbfi1fseqlem6 23293 itg2monolem3 23325 aaliou3lem1 23901 aaliou3lem2 23902 aaliou3lem3 23903 cxpsqrtlem 24248 cxpsqrt 24249 chordthmlem4 24362 heron 24365 asinsin 24419 gausslemma2dlem1a 24890 chtppilim 24964 dnizeq0 31635 dnizphlfeqhlf 31636 cnndvlem1 31698 cntotbnd 32765 halffl 38451 stoweidlem5 38898 stoweidlem28 38921 fourierdlem103 39102 fourierdlem104 39103 |
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