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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 11523 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) | |
| 2 | 1 | ancoms 463 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) |
| 3 | simpl 487 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → 𝐴 ∈ ℝ) | |
| 4 | ltaddpos 11705 | . . 3 ⊢ (((𝐵 − 𝐴) ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) | |
| 5 | 2, 3, 4 | syl2anc 595 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) |
| 6 | recn 11191 | . . . 4 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 7 | recn 11191 | . . . 4 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
| 8 | pncan3 11466 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) | |
| 9 | 6, 7, 8 | syl2an 607 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) |
| 10 | 9 | breq2d 5122 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < (𝐴 + (𝐵 − 𝐴)) ↔ 𝐴 < 𝐵)) |
| 11 | 5, 10 | bitr2d 283 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 < 𝐵 ↔ 0 < (𝐵 − 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 class class class wbr 5110 (class class class)co 7412 ℂcc 11099 ℝcr 11100 0cc0 11101 + caddc 11104 < clt 11244 − cmin 11442 |
| 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 |
| 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-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-ltxr 11249 df-sub 11444 df-neg 11445 |
| This theorem is referenced by: posdifi 11765 posdifd 11802 nnsub 12281 nn0sub 12555 znnsub 12641 rpnnen1lem5 13006 difrp 13057 qbtwnre 13226 eluzgtdifelfzo 13758 subfzo0 13823 expnbnd 14270 expmulnbnd 14273 pfxccatin12lem3 14771 eflt 16174 cos01gt0 16248 ndvdsadd 16469 nn0seqcvgd 16629 prmgaplem7 17118 cshwshashlem2 17157 dvcvx 26160 abelthlem7 26579 sinq12gt0 26650 cosq14gt0 26653 cosne0 26672 tanregt0 26682 logdivlti 26763 logcnlem4 26788 scvxcvx 27128 perfectlem2 27372 rplogsumlem2 27627 dchrisum0flblem1 27650 crctcshwlkn0lem3 30139 crctcshwlkn0lem7 30143 mblfinlem3 38288 mblfinlem4 38289 dvasin 38333 geomcau 38388 bfp 38453 submodlt 48070 perfectALTVlem2 48464 |
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