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| Mirrors > Home > MPE Home > Th. List > xaddcl | Structured version Visualization version GIF version | ||
| Description: The extended real addition operation is closed in extended reals. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xaddcl | ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xaddf 13277 | . 2 ⊢ +𝑒 :(ℝ* × ℝ*)⟶ℝ* | |
| 2 | 1 | fovcl 7542 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 (class class class)co 7414 ℝ*cxr 11267 +𝑒 cxad 13162 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-1cn 11183 ax-addrcl 11186 ax-rnegex 11196 ax-cnre 11198 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7987 df-2nd 7988 df-pnf 11270 df-mnf 11271 df-xr 11272 df-xadd 13165 |
| This theorem is used by: xaddass 13302 xaddass2 13303 xleadd1a 13306 xleadd1 13308 xltadd1 13309 xaddge0 13311 xle2add 13312 xlt2add 13313 xsubge0 13314 xposdif 13315 xlesubadd 13316 xadddi 13348 xadddir 13349 xadddi2 13350 xadddi2r 13351 xaddcld 13354 ge0xaddcl 13516 xrsmgm 21621 xrsds 21624 xrs1mnd 21654 xrsxmet 25037 xrofsup 33239 supxrgelem 46168 caragenel2d 47361 |
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