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| Mirrors > Home > MPE Home > Th. List > xnegid | Structured version Visualization version GIF version | ||
| Description: Extended real version of negid 11504. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xnegid | ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elxr 13140 | . 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞)) | |
| 2 | rexneg 13236 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝑒𝐴 = -𝐴) | |
| 3 | 2 | oveq2d 7427 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = (𝐴 +𝑒 -𝐴)) |
| 4 | renegcl 11520 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) | |
| 5 | rexadd 13257 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ -𝐴 ∈ ℝ) → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) | |
| 6 | 4, 5 | mpdan 699 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) |
| 7 | recn 11189 | . . . . 5 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 8 | 7 | negidd 11558 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 + -𝐴) = 0) |
| 9 | 3, 6, 8 | 3eqtrd 2808 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 10 | id 23 | . . . . 5 ⊢ (𝐴 = +∞ → 𝐴 = +∞) | |
| 11 | xnegeq 13232 | . . . . . 6 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -𝑒+∞) | |
| 12 | xnegpnf 13234 | . . . . . 6 ⊢ -𝑒+∞ = -∞ | |
| 13 | 11, 12 | eqtrdi 2820 | . . . . 5 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -∞) |
| 14 | 10, 13 | oveq12d 7429 | . . . 4 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = (+∞ +𝑒 -∞)) |
| 15 | pnfaddmnf 13255 | . . . 4 ⊢ (+∞ +𝑒 -∞) = 0 | |
| 16 | 14, 15 | eqtrdi 2820 | . . 3 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 17 | id 23 | . . . . 5 ⊢ (𝐴 = -∞ → 𝐴 = -∞) | |
| 18 | xnegeq 13232 | . . . . . 6 ⊢ (𝐴 = -∞ → -𝑒𝐴 = -𝑒-∞) | |
| 19 | xnegmnf 13235 | . . . . . 6 ⊢ -𝑒-∞ = +∞ | |
| 20 | 18, 19 | eqtrdi 2820 | . . . . 5 ⊢ (𝐴 = -∞ → -𝑒𝐴 = +∞) |
| 21 | 17, 20 | oveq12d 7429 | . . . 4 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = (-∞ +𝑒 +∞)) |
| 22 | mnfaddpnf 13256 | . . . 4 ⊢ (-∞ +𝑒 +∞) = 0 | |
| 23 | 21, 22 | eqtrdi 2820 | . . 3 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 24 | 9, 16, 23 | 3jaoi 1452 | . 2 ⊢ ((𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞) → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 25 | 1, 24 | sylbi 220 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ w3o 1100 = wceq 1567 ∈ wcel 2149 (class class class)co 7411 ℝcr 11098 0cc0 11099 + caddc 11102 +∞cpnf 11239 -∞cmnf 11240 ℝ*cxr 11241 -cneg 11441 -𝑒cxne 13133 +𝑒 cxad 13134 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-po 5570 df-so 5571 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 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 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-sub 11442 df-neg 11443 df-xneg 13136 df-xadd 13137 |
| This theorem is referenced by: xrsxmet 24935 xaddeq0 33038 xlt2addrd 33044 xrge0npcan 33280 carsgclctunlem2 34653 |
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