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| Mirrors > Home > MPE Home > Th. List > xaddrid | Structured version Visualization version GIF version | ||
| Description: Extended real version of addrid 11495. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xaddrid | ⊢ (𝐴 ∈ ℝ* → (𝐴 +e 0) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elxr 13250 | . 2 ⊢ (𝐴 ∈ ℝ* ↔ (𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞)) | |
| 2 | 0re 11315 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 3 | rexadd 13367 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐴 +e 0) = (𝐴 + 0)) | |
| 4 | 2, 3 | mpan2 704 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 +e 0) = (𝐴 + 0)) |
| 5 | recn 11295 | . . . . 5 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
| 6 | 5 | addridd 11515 | . . . 4 ⊢ (𝐴 ∈ ℝ → (𝐴 + 0) = 𝐴) |
| 7 | 4, 6 | eqtrd 2795 | . . 3 ⊢ (𝐴 ∈ ℝ → (𝐴 +e 0) = 𝐴) |
| 8 | 0xr 11361 | . . . . 5 ⊢ 0 ∈ ℝ* | |
| 9 | renemnf 11363 | . . . . . 6 ⊢ (0 ∈ ℝ → 0 ≠ -∞) | |
| 10 | 2, 9 | ax-mp 5 | . . . . 5 ⊢ 0 ≠ -∞ |
| 11 | xaddpnf2 13362 | . . . . 5 ⊢ ((0 ∈ ℝ* ∧ 0 ≠ -∞) → (+∞ +e 0) = +∞) | |
| 12 | 8, 10, 11 | mp2an 705 | . . . 4 ⊢ (+∞ +e 0) = +∞ |
| 13 | oveq1 7429 | . . . 4 ⊢ (𝐴 = +∞ → (𝐴 +e 0) = (+∞ +e 0)) | |
| 14 | id 23 | . . . 4 ⊢ (𝐴 = +∞ → 𝐴 = +∞) | |
| 15 | 12, 13, 14 | 3eqtr4a 2821 | . . 3 ⊢ (𝐴 = +∞ → (𝐴 +e 0) = 𝐴) |
| 16 | renepnf 11362 | . . . . . 6 ⊢ (0 ∈ ℝ → 0 ≠ +∞) | |
| 17 | 2, 16 | ax-mp 5 | . . . . 5 ⊢ 0 ≠ +∞ |
| 18 | xaddmnf2 13364 | . . . . 5 ⊢ ((0 ∈ ℝ* ∧ 0 ≠ +∞) → (-∞ +e 0) = -∞) | |
| 19 | 8, 17, 18 | mp2an 705 | . . . 4 ⊢ (-∞ +e 0) = -∞ |
| 20 | oveq1 7429 | . . . 4 ⊢ (𝐴 = -∞ → (𝐴 +e 0) = (-∞ +e 0)) | |
| 21 | id 23 | . . . 4 ⊢ (𝐴 = -∞ → 𝐴 = -∞) | |
| 22 | 19, 20, 21 | 3eqtr4a 2821 | . . 3 ⊢ (𝐴 = -∞ → (𝐴 +e 0) = 𝐴) |
| 23 | 7, 15, 22 | 3jaoi 1454 | . 2 ⊢ ((𝐴 ∈ ℝ ∨ 𝐴 = +∞ ∨ 𝐴 = -∞) → (𝐴 +e 0) = 𝐴) |
| 24 | 1, 23 | sylbi 220 | 1 ⊢ (𝐴 ∈ ℝ* → (𝐴 +e 0) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∨ w3o 1102 = wceq 1569 ∈ wcel 2144 ≠ wne 2955 (class class class)co 7422 ℝcr 11204 0cc0 11205 + caddc 11208 +∞cpnf 11345 -∞cmnf 11346 ℝ*cxr 11347 +e cxad 13244 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7753 ax-cnex 11261 ax-resscn 11262 ax-1cn 11263 ax-icn 11264 ax-addcl 11265 ax-addrcl 11266 ax-mulcl 11267 ax-mulrcl 11268 ax-mulcom 11269 ax-addass 11270 ax-mulass 11271 ax-distr 11272 ax-i2m1 11273 ax-1ne0 11274 ax-1rid 11275 ax-rnegex 11276 ax-rrecex 11277 ax-cnre 11278 ax-pre-lttri 11279 ax-pre-lttrn 11280 ax-pre-ltadd 11281 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-po 5558 df-so 5559 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-ov 7425 df-oprab 7426 df-mpo 7427 df-er 8722 df-en 8979 df-dom 8980 df-sdom 8981 df-pnf 11350 df-mnf 11351 df-xr 11352 df-ltxr 11353 df-xadd 13247 |
| This theorem is used by: xaddlid 13377 xaddridd 13378 xnn0xadd0 13382 xpncan 13386 xadddi 13430 xrsnsgrp 21721 imasdsf1olem 24699 vtxdlfgrval 30073 vtxdginducedm1 30131 xraddge02 33397 xlt2addrd 33399 xrs0 33615 xrge0addgt0 33626 xrge0npcan 33629 metideq 34573 metider 34574 esumpad 34735 esumpr2 34747 esumpfinvallem 34754 esumpmono 34759 ddemeas 34917 aean 34925 baselcarsg 34986 carsgclctunlem2 34999 xadd0ge 46441 sge0tsms 47497 sge0ss 47529 |
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