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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 12111 | . 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 2145 class class class wbr 5107 (class class class)co 7417 ℝcr 11127 0cc0 11128 < clt 11271 / cdiv 11899 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-po 5567 df-so 5568 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-er 8700 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-div 11900 |
| This theorem is used by: gtndiv 12702 nndivdvds 16357 nnoddm1d2 16482 bitsfzo 16531 sqgcd 16658 qredeu 16754 pythagtriplem19 16931 pcadd 16987 znidomb 21780 tangtx 26750 cos02pilt1 26771 cosne0 26774 jensenlem2 27232 bposlem6 27533 lgseisenlem1 27619 2sqlem8 27670 omssubadd 34819 knoppndvlem19 37235 knoppndvlem21 37237 itg2addnclem 38428 3lexlogpow2ineq2 42933 3lexlogpow5ineq5 42934 aks6d1c1 42990 aks6d1c4 42998 aks6d1c2 43004 oexpreposd 43205 flt4lem6 43512 pellexlem2 43679 sumnnodd 46468 sinaover2ne0 46704 ioodvbdlimc1lem1 46767 ioodvbdlimc1lem2 46768 ioodvbdlimc2lem 46770 stoweidlem36 46872 stoweidlem52 46888 dirkertrigeqlem3 46936 fourierdlem24 46967 fourierdlem79 47021 hoiqssbllem2 47459 nneven 48622 blennngt2o2 49530 |
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