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| Mirrors > Home > MPE Home > Th. List > divgt0d | Structured version Visualization version GIF version | ||
| Description: The ratio of two positive numbers is positive. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| ltp1d.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| divgt0d.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| divgt0d.3 | ⊢ (𝜑 → 0 < 𝐴) |
| divgt0d.4 | ⊢ (𝜑 → 0 < 𝐵) |
| Ref | Expression |
|---|---|
| divgt0d | ⊢ (𝜑 → 0 < (𝐴 / 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltp1d.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | divgt0d.3 | . 2 ⊢ (𝜑 → 0 < 𝐴) | |
| 3 | divgt0d.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | divgt0d.4 | . 2 ⊢ (𝜑 → 0 < 𝐵) | |
| 5 | divgt0 12188 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 0 < 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 0 < (𝐴 / 𝐵)) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 852 | 1 ⊢ (𝜑 → 0 < (𝐴 / 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 class class class wbr 5102 (class class class)co 7420 ℝcr 11202 0cc0 11203 < clt 11346 / cdiv 11976 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-po 5558 df-so 5559 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-er 8720 df-en 8977 df-dom 8978 df-sdom 8979 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 |
| This theorem is used by: gtndiv 12779 nndivdvds 16436 nnoddm1d2 16561 bitsfzo 16610 sqgcd 16741 qredeu 16838 pythagtriplem19 17016 pcadd 17072 znidomb 21872 tangtx 26839 cos02pilt1 26859 cosne0 26862 jensenlem2 27320 bposlem6 27621 lgseisenlem1 27707 2sqlem8 27758 flt4lem6 27993 omssubadd 34978 knoppndvlem19 37488 knoppndvlem21 37490 itg2addnclem 38682 3lexlogpow2ineq2 43202 3lexlogpow5ineq5 43203 aks6d1c1 43259 aks6d1c4 43267 aks6d1c2 43273 oexpreposd 43472 pellexlem2 43930 sumnnodd 46735 sinaover2ne0 46971 ioodvbdlimc1lem1 47034 ioodvbdlimc1lem2 47035 ioodvbdlimc2lem 47037 stoweidlem36 47139 stoweidlem52 47155 dirkertrigeqlem3 47203 fourierdlem24 47234 fourierdlem79 47288 hoiqssbllem2 47726 nneven 48889 blennngt2o2 49797 |
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