| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > xnegid | Structured version Visualization version GIF version | ||
| Description: Extended real version of negid 11411. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xnegid | ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elxr 13018 | . 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞)) | |
| 2 | rexneg 13113 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝑒𝐴 = -𝐴) | |
| 3 | 2 | oveq2d 7365 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = (𝐴 +𝑒 -𝐴)) |
| 4 | renegcl 11427 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) | |
| 5 | rexadd 13134 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ -𝐴 ∈ ℝ) → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) | |
| 6 | 4, 5 | mpdan 687 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) |
| 7 | recn 11099 | . . . . 5 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 8 | 7 | negidd 11465 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 + -𝐴) = 0) |
| 9 | 3, 6, 8 | 3eqtrd 2768 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 10 | id 22 | . . . . 5 ⊢ (𝐴 = +∞ → 𝐴 = +∞) | |
| 11 | xnegeq 13109 | . . . . . 6 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -𝑒+∞) | |
| 12 | xnegpnf 13111 | . . . . . 6 ⊢ -𝑒+∞ = -∞ | |
| 13 | 11, 12 | eqtrdi 2780 | . . . . 5 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -∞) |
| 14 | 10, 13 | oveq12d 7367 | . . . 4 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = (+∞ +𝑒 -∞)) |
| 15 | pnfaddmnf 13132 | . . . 4 ⊢ (+∞ +𝑒 -∞) = 0 | |
| 16 | 14, 15 | eqtrdi 2780 | . . 3 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 17 | id 22 | . . . . 5 ⊢ (𝐴 = -∞ → 𝐴 = -∞) | |
| 18 | xnegeq 13109 | . . . . . 6 ⊢ (𝐴 = -∞ → -𝑒𝐴 = -𝑒-∞) | |
| 19 | xnegmnf 13112 | . . . . . 6 ⊢ -𝑒-∞ = +∞ | |
| 20 | 18, 19 | eqtrdi 2780 | . . . . 5 ⊢ (𝐴 = -∞ → -𝑒𝐴 = +∞) |
| 21 | 17, 20 | oveq12d 7367 | . . . 4 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = (-∞ +𝑒 +∞)) |
| 22 | mnfaddpnf 13133 | . . . 4 ⊢ (-∞ +𝑒 +∞) = 0 | |
| 23 | 21, 22 | eqtrdi 2780 | . . 3 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 24 | 9, 16, 23 | 3jaoi 1430 | . 2 ⊢ ((𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞) → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 25 | 1, 24 | sylbi 217 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ w3o 1085 = wceq 1540 ∈ wcel 2109 (class class class)co 7349 ℝcr 11008 0cc0 11009 + caddc 11012 +∞cpnf 11146 -∞cmnf 11147 ℝ*cxr 11148 -cneg 11348 -𝑒cxne 13011 +𝑒 cxad 13012 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5235 ax-nul 5245 ax-pow 5304 ax-pr 5371 ax-un 7671 ax-cnex 11065 ax-resscn 11066 ax-1cn 11067 ax-icn 11068 ax-addcl 11069 ax-addrcl 11070 ax-mulcl 11071 ax-mulrcl 11072 ax-mulcom 11073 ax-addass 11074 ax-mulass 11075 ax-distr 11076 ax-i2m1 11077 ax-1ne0 11078 ax-1rid 11079 ax-rnegex 11080 ax-rrecex 11081 ax-cnre 11082 ax-pre-lttri 11083 ax-pre-lttrn 11084 ax-pre-ltadd 11085 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3344 df-rab 3395 df-v 3438 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4285 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4859 df-br 5093 df-opab 5155 df-mpt 5174 df-id 5514 df-po 5527 df-so 5528 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6438 df-fun 6484 df-fn 6485 df-f 6486 df-f1 6487 df-fo 6488 df-f1o 6489 df-fv 6490 df-riota 7306 df-ov 7352 df-oprab 7353 df-mpo 7354 df-er 8625 df-en 8873 df-dom 8874 df-sdom 8875 df-pnf 11151 df-mnf 11152 df-xr 11153 df-ltxr 11154 df-sub 11349 df-neg 11350 df-xneg 13014 df-xadd 13015 |
| This theorem is referenced by: xrsxmet 24696 xaddeq0 32696 xlt2addrd 32702 xrge0npcan 32974 carsgclctunlem2 34287 |
| Copyright terms: Public domain | W3C validator |