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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 13361 | . 2 ⊢ +e :(ℝ* × ℝ*)⟶ℝ* | |
| 2 | 1 | fovcl 7552 | 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 2144 (class class class)co 7424 ℝ*cxr 11349 +e cxad 13246 |
| 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 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-1cn 11265 ax-addrcl 11268 ax-rnegex 11278 ax-cnre 11280 |
| 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-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-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-fv 6551 df-ov 7427 df-oprab 7428 df-mpo 7429 df-1st 8005 df-2nd 8006 df-pnf 11352 df-mnf 11353 df-xr 11354 df-xadd 13249 |
| This theorem is used by: xaddass 13386 xaddass2 13387 xleadd1a 13390 xleadd1 13392 xltadd1 13393 xaddge0 13395 xle2add 13396 xlt2add 13397 xsubge0 13398 xposdif 13399 xlesubadd 13400 xadddi 13432 xadddir 13433 xadddi2 13434 xadddi2r 13435 xaddcld 13438 ge0xaddcl 13600 xrsmgm 21722 xrsds 21725 xrs1mnd 21755 xrsxmet 25138 xrofsup 33409 supxrgelem 46485 caragenel2d 47678 |
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