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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 12084 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 0 < 𝐴) ∧ (𝐵 ∈ ℝ ∧ 0 < 𝐵)) → 0 < (𝐴 / 𝐵)) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 851 | 1 ⊢ (𝜑 → 0 < (𝐴 / 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 class class class wbr 5110 (class class class)co 7412 ℝcr 11100 0cc0 11101 < clt 11244 / cdiv 11872 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 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 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 |
| This theorem is referenced by: gtndiv 12674 nndivdvds 16320 nnoddm1d2 16445 bitsfzo 16494 sqgcd 16621 qredeu 16717 pythagtriplem19 16894 pcadd 16950 znidomb 21692 tangtx 26651 cos02pilt1 26672 cosne0 26675 jensenlem2 27133 bposlem6 27434 lgseisenlem1 27520 2sqlem8 27571 omssubadd 34671 knoppndvlem19 37100 knoppndvlem21 37102 itg2addnclem 38303 3lexlogpow2ineq2 42807 3lexlogpow5ineq5 42808 aks6d1c1 42864 aks6d1c4 42872 aks6d1c2 42878 oexpreposd 43064 flt4lem6 43373 pellexlem2 43540 sumnnodd 46329 sinaover2ne0 46565 ioodvbdlimc1lem1 46628 ioodvbdlimc1lem2 46629 ioodvbdlimc2lem 46631 stoweidlem36 46733 stoweidlem52 46749 dirkertrigeqlem3 46797 fourierdlem24 46828 fourierdlem79 46882 hoiqssbllem2 47320 nneven 48446 blennngt2o2 49355 |
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