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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 11550 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) | |
| 2 | 1 | ancoms 464 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐵 − 𝐴) ∈ ℝ) |
| 3 | simpl 488 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → 𝐴 ∈ ℝ) | |
| 4 | ltaddpos 11732 | . . 3 ⊢ (((𝐵 − 𝐴) ∈ ℝ ∧ 𝐴 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) | |
| 5 | 2, 3, 4 | syl2anc 596 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (0 < (𝐵 − 𝐴) ↔ 𝐴 < (𝐴 + (𝐵 − 𝐴)))) |
| 6 | recn 11218 | . . . 4 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 7 | recn 11218 | . . . 4 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
| 8 | pncan3 11493 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) | |
| 9 | 6, 7, 8 | syl2an 608 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + (𝐵 − 𝐴)) = 𝐵) |
| 10 | 9 | breq2d 5119 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 class class class wbr 5107 (class class class)co 7417 ℂcc 11126 ℝcr 11127 0cc0 11128 + caddc 11131 < clt 11271 − cmin 11469 |
| 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 |
| 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-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-ltxr 11276 df-sub 11471 df-neg 11472 |
| This theorem is used by: posdifi 11792 posdifd 11829 nnsub 12308 nn0sub 12582 znnsub 12668 rpnnen1lem5 13035 difrp 13086 qbtwnre 13255 eluzgtdifelfzo 13787 subfzo0 13853 expnbnd 14300 expmulnbnd 14303 pfxccatin12lem3 14805 eflt 16211 cos01gt0 16285 ndvdsadd 16506 nn0seqcvgd 16666 prmgaplem7 17155 cshwshashlem2 17194 dvcvx 26254 abelthlem7 26681 sinq12gt0 26752 cosq14gt0 26755 cosne0 26774 tanregt0 26784 logdivlti 26865 logcnlem4 26890 scvxcvx 27230 perfectlem2 27474 rplogsumlem2 27729 dchrisum0flblem1 27752 crctcshwlkn0lem3 30288 crctcshwlkn0lem7 30292 mblfinlem3 38416 mblfinlem4 38417 dvasin 38461 geomcau 38517 bfp 38582 submodlt 48252 perfectALTVlem2 48646 |
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