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| Mirrors > Home > MPE Home > Th. List > xnegid | Structured version Visualization version GIF version | ||
| Description: Extended real version of negid 11478. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xnegid | ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elxr 13118 | . 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞)) | |
| 2 | rexneg 13214 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝑒𝐴 = -𝐴) | |
| 3 | 2 | oveq2d 7412 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = (𝐴 +𝑒 -𝐴)) |
| 4 | renegcl 11494 | . . . . 5 ⊢ (𝐴 ∈ ℝ → -𝐴 ∈ ℝ) | |
| 5 | rexadd 13235 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ -𝐴 ∈ ℝ) → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) | |
| 6 | 4, 5 | mpdan 697 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝐴) = (𝐴 + -𝐴)) |
| 7 | recn 11163 | . . . . 5 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 8 | 7 | negidd 11532 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 + -𝐴) = 0) |
| 9 | 3, 6, 8 | 3eqtrd 2801 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 10 | id 22 | . . . . 5 ⊢ (𝐴 = +∞ → 𝐴 = +∞) | |
| 11 | xnegeq 13210 | . . . . . 6 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -𝑒+∞) | |
| 12 | xnegpnf 13212 | . . . . . 6 ⊢ -𝑒+∞ = -∞ | |
| 13 | 11, 12 | eqtrdi 2813 | . . . . 5 ⊢ (𝐴 = +∞ → -𝑒𝐴 = -∞) |
| 14 | 10, 13 | oveq12d 7414 | . . . 4 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = (+∞ +𝑒 -∞)) |
| 15 | pnfaddmnf 13233 | . . . 4 ⊢ (+∞ +𝑒 -∞) = 0 | |
| 16 | 14, 15 | eqtrdi 2813 | . . 3 ⊢ (𝐴 = +∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 17 | id 22 | . . . . 5 ⊢ (𝐴 = -∞ → 𝐴 = -∞) | |
| 18 | xnegeq 13210 | . . . . . 6 ⊢ (𝐴 = -∞ → -𝑒𝐴 = -𝑒-∞) | |
| 19 | xnegmnf 13213 | . . . . . 6 ⊢ -𝑒-∞ = +∞ | |
| 20 | 18, 19 | eqtrdi 2813 | . . . . 5 ⊢ (𝐴 = -∞ → -𝑒𝐴 = +∞) |
| 21 | 17, 20 | oveq12d 7414 | . . . 4 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = (-∞ +𝑒 +∞)) |
| 22 | mnfaddpnf 13234 | . . . 4 ⊢ (-∞ +𝑒 +∞) = 0 | |
| 23 | 21, 22 | eqtrdi 2813 | . . 3 ⊢ (𝐴 = -∞ → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 24 | 9, 16, 23 | 3jaoi 1447 | . 2 ⊢ ((𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞) → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| 25 | 1, 24 | sylbi 219 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 +𝑒 -𝑒𝐴) = 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∨ w3o 1097 = wceq 1560 ∈ wcel 2142 (class class class)co 7396 ℝcr 11072 0cc0 11073 + caddc 11076 +∞cpnf 11213 -∞cmnf 11214 ℝ*cxr 11215 -cneg 11415 -𝑒cxne 13111 +𝑒 cxad 13112 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-po 5555 df-so 5556 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-sub 11416 df-neg 11417 df-xneg 13114 df-xadd 13115 |
| This theorem is referenced by: xrsxmet 24867 xaddeq0 32952 xlt2addrd 32958 xrge0npcan 33195 carsgclctunlem2 34613 |
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