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| Mirrors > Home > ILE Home > Th. List > Mathboxes > dichmul0orlem6 | GIF version | ||
| Description: Lemma for dichmul0or 16743. (Contributed by Matthew House, 28-Jun-2026.) |
| Ref | Expression |
|---|---|
| dichmul0orlem6.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| dichmul0orlem6.2 | ⊢ (𝜑 → ((abs‘𝐴) − 𝐴) = 0) |
| Ref | Expression |
|---|---|
| dichmul0orlem6 | ⊢ (𝜑 → 0 ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0red 8321 | . 2 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 2 | dichmul0orlem6.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 3 | 2 | adantr 276 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝐴 < 0) → 𝐴 ∈ ℝ) |
| 4 | 3 | recnd 8348 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 < 0) → 𝐴 ∈ ℂ) |
| 5 | 4 | abscld 11930 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 < 0) → (abs‘𝐴) ∈ ℝ) |
| 6 | 5 | recnd 8348 | . . . . 5 ⊢ ((𝜑 ∧ 𝐴 < 0) → (abs‘𝐴) ∈ ℂ) |
| 7 | 6, 4 | negsubd 8637 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 < 0) → ((abs‘𝐴) + -𝐴) = ((abs‘𝐴) − 𝐴)) |
| 8 | dichmul0orlem6.2 | . . . . 5 ⊢ (𝜑 → ((abs‘𝐴) − 𝐴) = 0) | |
| 9 | 8 | adantr 276 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 < 0) → ((abs‘𝐴) − 𝐴) = 0) |
| 10 | 7, 9 | eqtrd 2271 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 0) → ((abs‘𝐴) + -𝐴) = 0) |
| 11 | 3 | renegcld 8701 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 < 0) → -𝐴 ∈ ℝ) |
| 12 | simpr 110 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝐴 < 0) → 𝐴 < 0) | |
| 13 | 3, 12 | lt0ap0d 8971 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 < 0) → 𝐴 # 0) |
| 14 | absgt0ap 11848 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (𝐴 # 0 ↔ 0 < (abs‘𝐴))) | |
| 15 | 4, 14 | syl 14 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 < 0) → (𝐴 # 0 ↔ 0 < (abs‘𝐴))) |
| 16 | 13, 15 | mpbid 147 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 < 0) → 0 < (abs‘𝐴)) |
| 17 | 2 | lt0neg1d 8837 | . . . . . . 7 ⊢ (𝜑 → (𝐴 < 0 ↔ 0 < -𝐴)) |
| 18 | 17 | biimpa 296 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 < 0) → 0 < -𝐴) |
| 19 | 5, 11, 16, 18 | addgt0d 8843 | . . . . 5 ⊢ ((𝜑 ∧ 𝐴 < 0) → 0 < ((abs‘𝐴) + -𝐴)) |
| 20 | 19 | gt0ne0d 8834 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 < 0) → ((abs‘𝐴) + -𝐴) ≠ 0) |
| 21 | 20 | neneqd 2441 | . . 3 ⊢ ((𝜑 ∧ 𝐴 < 0) → ¬ ((abs‘𝐴) + -𝐴) = 0) |
| 22 | 10, 21 | pm2.65da 671 | . 2 ⊢ (𝜑 → ¬ 𝐴 < 0) |
| 23 | 1, 2, 22 | nltled 8441 | 1 ⊢ (𝜑 → 0 ≤ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1402 ∈ wcel 2209 class class class wbr 4128 ‘cfv 5375 (class class class)co 6079 ℂcc 8171 ℝcr 8172 0cc0 8173 + caddc 8176 < clt 8354 ≤ cle 8355 − cmin 8491 -cneg 8492 # cap 8903 abscabs 11746 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-mulrcl 8272 ax-addcom 8273 ax-mulcom 8274 ax-addass 8275 ax-mulass 8276 ax-distr 8277 ax-i2m1 8278 ax-0lt1 8279 ax-1rid 8280 ax-0id 8281 ax-rnegex 8282 ax-precex 8283 ax-cnre 8284 ax-pre-ltirr 8285 ax-pre-ltwlin 8286 ax-pre-lttrn 8287 ax-pre-apti 8288 ax-pre-ltadd 8289 ax-pre-mulgt0 8290 ax-pre-mulext 8291 ax-arch 8292 ax-caucvg 8293 |
| This theorem depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-ilim 4512 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-1st 6368 df-2nd 6369 df-recs 6570 df-frec 6656 df-pnf 8356 df-mnf 8357 df-xr 8358 df-ltxr 8359 df-le 8360 df-sub 8493 df-neg 8494 df-reap 8897 df-ap 8904 df-div 8997 df-inn 9288 df-2 9346 df-3 9347 df-4 9348 df-n0 9547 df-z 9628 df-uz 9905 df-rp 10038 df-seqfrec 10868 df-exp 10959 df-cj 11590 df-re 11591 df-im 11592 df-rsqrt 11747 df-abs 11748 |
| This theorem is referenced by: dichmul0orlem7 16742 |
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