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| Mirrors > Home > MPE Home > Th. List > divgt0ii | Structured version Visualization version GIF version | ||
| Description: The ratio of two positive numbers is positive. (Contributed by NM, 18-May-1999.) |
| Ref | Expression |
|---|---|
| ltplus1.1 | ⊢ 𝐴 ∈ ℝ |
| prodgt0.2 | ⊢ 𝐵 ∈ ℝ |
| ltreci.3 | ⊢ 0 < 𝐴 |
| ltreci.4 | ⊢ 0 < 𝐵 |
| Ref | Expression |
|---|---|
| divgt0ii | ⊢ 0 < (𝐴 / 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltreci.3 | . 2 ⊢ 0 < 𝐴 | |
| 2 | ltplus1.1 | . . 3 ⊢ 𝐴 ∈ ℝ | |
| 3 | prodgt0.2 | . . 3 ⊢ 𝐵 ∈ ℝ | |
| 4 | ltreci.4 | . . 3 ⊢ 0 < 𝐵 | |
| 5 | 2, 3, 4 | divgt0i2i 12071 | . 2 ⊢ (0 < 𝐴 → 0 < (𝐴 / 𝐵)) |
| 6 | 1, 5 | ax-mp 5 | 1 ⊢ 0 < (𝐴 / 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 class class class wbr 5085 (class class class)co 7367 ℝcr 11037 0cc0 11038 < clt 11179 / cdiv 11807 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 |
| This theorem is referenced by: 0.999... 15846 sinhalfpilem 26427 sincos4thpi 26477 sincos6thpi 26480 tanord1 26501 ppiub 27167 chebbnd1 27435 asin1half 42789 acos1half 42790 fourierdlem103 46637 fourierdlem104 46638 goldrapos 47331 |
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