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| Mirrors > Home > MPE Home > Th. List > posdif | Structured version Visualization version GIF version | ||
| Description: Comparison of two numbers whose difference is positive. (Contributed by NM, 17-Nov-2004.) |
| Ref | Expression |
|---|---|
| posdif | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ 0 < (𝐵 − 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resubcl 11458 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) | |
| 2 | 1 | ancoms 458 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) |
| 3 | simpl 482 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → 𝐴 ∈ ℝ) | |
| 4 | ltaddpos 11640 | . . 3 ⊢ (((𝐵 − 𝐴) ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) | |
| 5 | 2, 3, 4 | syl2anc 585 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) |
| 6 | recn 11128 | . . . 4 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 7 | recn 11128 | . . . 4 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
| 8 | pncan3 11401 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) | |
| 9 | 6, 7, 8 | syl2an 597 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) |
| 10 | 9 | breq2d 5097 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < (𝐴 + (𝐵 − 𝐴)) ↔ 𝐴 < 𝐵)) |
| 11 | 5, 10 | bitr2d 280 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ 0 < (𝐵 − 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5085 (class class class)co 7367 ℂcc 11036 ℝcr 11037 0cc0 11038 + caddc 11041 < clt 11179 − cmin 11377 |
| 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 |
| 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-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-ltxr 11184 df-sub 11379 df-neg 11380 |
| This theorem is referenced by: posdifi 11700 posdifd 11737 nnsub 12221 nn0sub 12487 znnsub 12573 rpnnen1lem5 12931 difrp 12982 qbtwnre 13151 eluzgtdifelfzo 13682 subfzo0 13747 expnbnd 14194 expmulnbnd 14197 pfxccatin12lem3 14694 eflt 16084 cos01gt0 16158 ndvdsadd 16379 nn0seqcvgd 16539 prmgaplem7 17028 cshwshashlem2 17067 dvcvx 25987 abelthlem7 26403 sinq12gt0 26471 cosq14gt0 26474 cosne0 26493 tanregt0 26503 logdivlti 26584 logcnlem4 26609 scvxcvx 26949 perfectlem2 27193 rplogsumlem2 27448 dchrisum0flblem1 27471 crctcshwlkn0lem3 29880 crctcshwlkn0lem7 29884 mblfinlem3 37980 mblfinlem4 37981 dvasin 38025 geomcau 38080 bfp 38145 submodlt 47804 perfectALTVlem2 48198 |
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